matplotlib的50种阴影-主控​​图(带有完整的Python代码)

那些处理数据的人都清楚地知道,幸福不在神经网络中,而在于如何正确处理数据。 但是为了处理它们,您必须首先分析相关性,选择必要的数据,丢弃不必要的数据,依此类推。 为此,经常使用使用matplotlib库进行可视化。



在“里面”见我!

客制化


运行以下代码进行配置。 但是,各个图表会自己覆盖其设置。

# !pip install brewer2mpl import numpy as np import pandas as pd import matplotlib as mpl import matplotlib.pyplot as plt import seaborn as sns import warnings; warnings.filterwarnings(action='once') large = 22; med = 16; small = 12 params = {'axes.titlesize': large, 'legend.fontsize': med, 'figure.figsize': (16, 10), 'axes.labelsize': med, 'axes.titlesize': med, 'xtick.labelsize': med, 'ytick.labelsize': med, 'figure.titlesize': large} plt.rcParams.update(params) plt.style.use('seaborn-whitegrid') sns.set_style("white") %matplotlib inline # Version print(mpl.__version__) #> 3.0.0 print(sns.__version__) #> 0.9.0 

相关性


相关图用于可视化两个或多个变量之间的关系。 也就是说,一个变量相对于另一个变量如何变化。

1.散点图


Scatteplot是一个经典的基本图表视图,用于检查两个变量之间的关系。 如果数据中有多个组,则可以用不同的颜色可视化每个组。 在matplotlib中,您可以使用plt.scatterplot()轻松地执行此操作。

显示代码
 # Import dataset midwest = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/midwest_filter.csv") # Prepare Data # Create as many colors as there are unique midwest['category'] categories = np.unique(midwest['category']) colors = [plt.cm.tab10(i/float(len(categories)-1)) for i in range(len(categories))] # Draw Plot for Each Category plt.figure(figsize=(16, 10), dpi= 80, facecolor='w', edgecolor='k') for i, category in enumerate(categories): plt.scatter('area', 'poptotal', data=midwest.loc[midwest.category==category, :], s=20, c=colors[i], label=str(category)) # Decorations plt.gca().set(xlim=(0.0, 0.1), ylim=(0, 90000), xlabel='Area', ylabel='Population') plt.xticks(fontsize=12); plt.yticks(fontsize=12) plt.title("Scatterplot of Midwest Area vs Population", fontsize=22) plt.legend(fontsize=12) plt.show() 




2.带有小组捕获的气泡图


有时您想在边界内显示一组点以强调其重要性。 在此示例中,我们从应分配的数据帧中获取记录,并将它们传递给下面的代码中所述的circle()。

显示代码
 from matplotlib import patches from scipy.spatial import ConvexHull import warnings; warnings.simplefilter('ignore') sns.set_style("white") # Step 1: Prepare Data midwest = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/midwest_filter.csv") # As many colors as there are unique midwest['category'] categories = np.unique(midwest['category']) colors = [plt.cm.tab10(i/float(len(categories)-1)) for i in range(len(categories))] # Step 2: Draw Scatterplot with unique color for each category fig = plt.figure(figsize=(16, 10), dpi= 80, facecolor='w', edgecolor='k') for i, category in enumerate(categories): plt.scatter('area', 'poptotal', data=midwest.loc[midwest.category==category, :], s='dot_size', c=colors[i], label=str(category), edgecolors='black', linewidths=.5) # Step 3: Encircling # https://stackoverflow.com/questions/44575681/how-do-i-encircle-different-data-sets-in-scatter-plot def encircle(x,y, ax=None, **kw): if not ax: ax=plt.gca() p = np.c_[x,y] hull = ConvexHull(p) poly = plt.Polygon(p[hull.vertices,:], **kw) ax.add_patch(poly) # Select data to be encircled midwest_encircle_data = midwest.loc[midwest.state=='IN', :] # Draw polygon surrounding vertices encircle(midwest_encircle_data.area, midwest_encircle_data.poptotal, ec="k", fc="gold", alpha=0.1) encircle(midwest_encircle_data.area, midwest_encircle_data.poptotal, ec="firebrick", fc="none", linewidth=1.5) # Step 4: Decorations plt.gca().set(xlim=(0.0, 0.1), ylim=(0, 90000), xlabel='Area', ylabel='Population') plt.xticks(fontsize=12); plt.yticks(fontsize=12) plt.title("Bubble Plot with Encircling", fontsize=22) plt.legend(fontsize=12) plt.show() 




3.最佳拟合线性回归图


如果您想了解两个变量如何相对变化,则最佳拟合线是最佳的。 下图显示了不同数据组之间的最佳拟合差异。 要禁用分组并仅为整个数据集绘制一条最佳拟合线,请从下面的sns.lmplot()中删除hue ='cyl'参数。

显示代码
 # Import Data df = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/mpg_ggplot2.csv") df_select = df.loc[df.cyl.isin([4,8]), :] # Plot sns.set_style("white") gridobj = sns.lmplot(x="displ", y="hwy", hue="cyl", data=df_select, height=7, aspect=1.6, robust=True, palette='tab10', scatter_kws=dict(s=60, linewidths=.7, edgecolors='black')) # Decorations gridobj.set(xlim=(0.5, 7.5), ylim=(0, 50)) plt.title("Scatterplot with line of best fit grouped by number of cylinders", fontsize=20) plt.show() 




每个回归行都在其自己的列中

此外,您可以在单独的列中显示每个组的最佳拟合线。 您想通过在sns.lmplot()中设置col = groupingcolumn参数来做到这一点。

显示代码
 # Import Data df = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/mpg_ggplot2.csv") df_select = df.loc[df.cyl.isin([4,8]), :] # Each line in its own column sns.set_style("white") gridobj = sns.lmplot(x="displ", y="hwy", data=df_select, height=7, robust=True, palette='Set1', col="cyl", scatter_kws=dict(s=60, linewidths=.7, edgecolors='black')) # Decorations gridobj.set(xlim=(0.5, 7.5), ylim=(0, 50)) plt.show() 




4.条形图


通常,多个数据点具有相同的X和Y值,因此,多个数据点相互重叠并隐藏。 为避免这种情况,将点稍微分开一点,以便可以直观地看到它们。 使用stripplot()可以方便地完成此操作。

显示代码
 # Import Data df = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/mpg_ggplot2.csv") # Draw Stripplot fig, ax = plt.subplots(figsize=(16,10), dpi= 80) sns.stripplot(df.cty, df.hwy, jitter=0.25, size=8, ax=ax, linewidth=.5) # Decorations plt.title('Use jittered plots to avoid overlapping of points', fontsize=22) plt.show() 




5.计数图


避免重叠点的问题的另一种选择是根据该位置上有多少个点来增加点的大小。 因此,点的大小越大,其周围的点的集中度越大。

显示代码
 # Import Data df = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/mpg_ggplot2.csv") df_counts = df.groupby(['hwy', 'cty']).size().reset_index(name='counts') # Draw Stripplot fig, ax = plt.subplots(figsize=(16,10), dpi= 80) sns.scatterplot(df_counts.cty, df_counts.hwy, size=df_counts.counts*2, ax=ax) # Decorations plt.title('Counts Plot - Size of circle is bigger as more points overlap', fontsize=22) plt.show() 




6.条形图


线状直方图具有沿X和Y轴变量的直方图,用于直观显示X和Y之间的关系以及X和Y的一维分布。 此图通常用于数据分析(EDA)。

显示代码
 # Import Data df = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/mpg_ggplot2.csv") # Create Fig and gridspec fig = plt.figure(figsize=(16, 10), dpi= 80) grid = plt.GridSpec(4, 4, hspace=0.5, wspace=0.2) # Define the axes ax_main = fig.add_subplot(grid[:-1, :-1]) ax_right = fig.add_subplot(grid[:-1, -1], xticklabels=[], yticklabels=[]) ax_bottom = fig.add_subplot(grid[-1, 0:-1], xticklabels=[], yticklabels=[]) # Scatterplot on main ax ax_main.scatter('displ', 'hwy', s=df.cty*4, c=df.manufacturer.astype('category').cat.codes, alpha=.9, data=df, cmap="tab10", edgecolors='gray', linewidths=.5) # histogram on the right ax_bottom.hist(df.displ, 40, histtype='stepfilled', orientation='vertical', color='deeppink') ax_bottom.invert_yaxis() # histogram in the bottom ax_right.hist(df.hwy, 40, histtype='stepfilled', orientation='horizontal', color='deeppink') # Decorations ax_main.set(title='Scatterplot with Histograms \n displ vs hwy', xlabel='displ', ylabel='hwy') ax_main.title.set_fontsize(20) for item in ([ax_main.xaxis.label, ax_main.yaxis.label] + ax_main.get_xticklabels() + ax_main.get_yticklabels()): item.set_fontsize(14) xlabels = ax_main.get_xticks().tolist() ax_main.set_xticklabels(xlabels) plt.show() 




7.箱线图


箱线图的作用与逐行直方图相同。 但是,此图有助于确定X和Y的中位数,第25和第75个百分位数。

显示代码
 # Import Data df = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/mpg_ggplot2.csv") # Create Fig and gridspec fig = plt.figure(figsize=(16, 10), dpi= 80) grid = plt.GridSpec(4, 4, hspace=0.5, wspace=0.2) # Define the axes ax_main = fig.add_subplot(grid[:-1, :-1]) ax_right = fig.add_subplot(grid[:-1, -1], xticklabels=[], yticklabels=[]) ax_bottom = fig.add_subplot(grid[-1, 0:-1], xticklabels=[], yticklabels=[]) # Scatterplot on main ax ax_main.scatter('displ', 'hwy', s=df.cty*5, c=df.manufacturer.astype('category').cat.codes, alpha=.9, data=df, cmap="Set1", edgecolors='black', linewidths=.5) # Add a graph in each part sns.boxplot(df.hwy, ax=ax_right, orient="v") sns.boxplot(df.displ, ax=ax_bottom, orient="h") # Decorations ------------------ # Remove x axis name for the boxplot ax_bottom.set(xlabel='') ax_right.set(ylabel='') # Main Title, Xlabel and YLabel ax_main.set(title='Scatterplot with Histograms \n displ vs hwy', xlabel='displ', ylabel='hwy') # Set font size of different components ax_main.title.set_fontsize(20) for item in ([ax_main.xaxis.label, ax_main.yaxis.label] + ax_main.get_xticklabels() + ax_main.get_yticklabels()): item.set_fontsize(14) plt.show() 




8.相关图


相关图用于可视地查看给定数据集(或二维数组)中所有可能的数字变量对之间的相关度量。

显示代码
 # Import Dataset df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mtcars.csv") # Plot plt.figure(figsize=(12,10), dpi= 80) sns.heatmap(df.corr(), xticklabels=df.corr().columns, yticklabels=df.corr().columns, cmap='RdYlGn', center=0, annot=True) # Decorations plt.title('Correlogram of mtcars', fontsize=22) plt.xticks(fontsize=12) plt.yticks(fontsize=12) plt.show() 




9.配对时间表


通常用于研究分析中,以了解所有可能的数字变量对之间的关​​系。 这是二维分析的必需工具。

显示代码
 # Load Dataset df = sns.load_dataset('iris') # Plot plt.figure(figsize=(10,8), dpi= 80) sns.pairplot(df, kind="scatter", hue="species", plot_kws=dict(s=80, edgecolor="white", linewidth=2.5)) plt.show() 




显示代码
 # Load Dataset df = sns.load_dataset('iris') # Plot plt.figure(figsize=(10,8), dpi= 80) sns.pairplot(df, kind="reg", hue="species") plt.show() 




偏差


10.分流列


如果要查看元素如何根据一个度量标准变化,并可视化此色散的顺序和大小,则分散列是一个很好的工具。 它有助于快速区分数据中组的性能,非常直观,可立即传达含义。

显示代码
 # Prepare Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mtcars.csv") x = df.loc[:, ['mpg']] df['mpg_z'] = (x - x.mean())/x.std() df['colors'] = ['red' if x < 0 else 'green' for x in df['mpg_z']] df.sort_values('mpg_z', inplace=True) df.reset_index(inplace=True) # Draw plot plt.figure(figsize=(14,10), dpi= 80) plt.hlines(y=df.index, xmin=0, xmax=df.mpg_z, color=df.colors, alpha=0.4, linewidth=5) # Decorations plt.gca().set(ylabel='$Model$', xlabel='$Mileage$') plt.yticks(df.index, df.cars, fontsize=12) plt.title('Diverging Bars of Car Mileage', fontdict={'size':20}) plt.grid(linestyle='--', alpha=0.5) plt.show() 




11.用文本分隔列


-看起来像是分散的列,如果您希望以一种良好且可表达的方式显示图表中每个元素的重要性,则这是可取的。

显示代码
 # Prepare Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mtcars.csv") x = df.loc[:, ['mpg']] df['mpg_z'] = (x - x.mean())/x.std() df['colors'] = ['red' if x < 0 else 'green' for x in df['mpg_z']] df.sort_values('mpg_z', inplace=True) df.reset_index(inplace=True) # Draw plot plt.figure(figsize=(14,14), dpi= 80) plt.hlines(y=df.index, xmin=0, xmax=df.mpg_z) for x, y, tex in zip(df.mpg_z, df.index, df.mpg_z): t = plt.text(x, y, round(tex, 2), horizontalalignment='right' if x < 0 else 'left', verticalalignment='center', fontdict={'color':'red' if x < 0 else 'green', 'size':14}) # Decorations plt.yticks(df.index, df.cars, fontsize=12) plt.title('Diverging Text Bars of Car Mileage', fontdict={'size':20}) plt.grid(linestyle='--', alpha=0.5) plt.xlim(-2.5, 2.5) plt.show() 




12.发散点


分叉点的图形也类似于分叉列。 但是,与发散的色谱柱相比,没有色谱柱会降低组之间的对比度和差异程度。

显示代码
 # Prepare Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mtcars.csv") x = df.loc[:, ['mpg']] df['mpg_z'] = (x - x.mean())/x.std() df['colors'] = ['red' if x < 0 else 'darkgreen' for x in df['mpg_z']] df.sort_values('mpg_z', inplace=True) df.reset_index(inplace=True) # Draw plot plt.figure(figsize=(14,16), dpi= 80) plt.scatter(df.mpg_z, df.index, s=450, alpha=.6, color=df.colors) for x, y, tex in zip(df.mpg_z, df.index, df.mpg_z): t = plt.text(x, y, round(tex, 1), horizontalalignment='center', verticalalignment='center', fontdict={'color':'white'}) # Decorations # Lighten borders plt.gca().spines["top"].set_alpha(.3) plt.gca().spines["bottom"].set_alpha(.3) plt.gca().spines["right"].set_alpha(.3) plt.gca().spines["left"].set_alpha(.3) plt.yticks(df.index, df.cars) plt.title('Diverging Dotplot of Car Mileage', fontdict={'size':20}) plt.xlabel('$Mileage$') plt.grid(linestyle='--', alpha=0.5) plt.xlim(-2.5, 2.5) plt.show() 




13.带标记的发散棒棒糖图


棒棒糖提供了一种可视化差异的灵活方法,重点关注您要注意的任何相关数据点。

显示代码
 # Prepare Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mtcars.csv") x = df.loc[:, ['mpg']] df['mpg_z'] = (x - x.mean())/x.std() df['colors'] = 'black' # color fiat differently df.loc[df.cars == 'Fiat X1-9', 'colors'] = 'darkorange' df.sort_values('mpg_z', inplace=True) df.reset_index(inplace=True) # Draw plot import matplotlib.patches as patches plt.figure(figsize=(14,16), dpi= 80) plt.hlines(y=df.index, xmin=0, xmax=df.mpg_z, color=df.colors, alpha=0.4, linewidth=1) plt.scatter(df.mpg_z, df.index, color=df.colors, s=[600 if x == 'Fiat X1-9' else 300 for x in df.cars], alpha=0.6) plt.yticks(df.index, df.cars) plt.xticks(fontsize=12) # Annotate plt.annotate('Mercedes Models', xy=(0.0, 11.0), xytext=(1.0, 11), xycoords='data', fontsize=15, ha='center', va='center', bbox=dict(boxstyle='square', fc='firebrick'), arrowprops=dict(arrowstyle='-[, widthB=2.0, lengthB=1.5', lw=2.0, color='steelblue'), color='white') # Add Patches p1 = patches.Rectangle((-2.0, -1), width=.3, height=3, alpha=.2, facecolor='red') p2 = patches.Rectangle((1.5, 27), width=.8, height=5, alpha=.2, facecolor='green') plt.gca().add_patch(p1) plt.gca().add_patch(p2) # Decorate plt.title('Diverging Bars of Car Mileage', fontdict={'size':20}) plt.grid(linestyle='--', alpha=0.5) plt.show() 




14.面积图


区域图为轴和线之间的区域着色,不仅强调了峰谷和谷底,还强调了高低的持续时间。 高点时间越长,线下面积越大。

显示代码
 import numpy as np import pandas as pd # Prepare Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/economics.csv", parse_dates=['date']).head(100) x = np.arange(df.shape[0]) y_returns = (df.psavert.diff().fillna(0)/df.psavert.shift(1)).fillna(0) * 100 # Plot plt.figure(figsize=(16,10), dpi= 80) plt.fill_between(x[1:], y_returns[1:], 0, where=y_returns[1:] >= 0, facecolor='green', interpolate=True, alpha=0.7) plt.fill_between(x[1:], y_returns[1:], 0, where=y_returns[1:] <= 0, facecolor='red', interpolate=True, alpha=0.7) # Annotate plt.annotate('Peak \n1975', xy=(94.0, 21.0), xytext=(88.0, 28), bbox=dict(boxstyle='square', fc='firebrick'), arrowprops=dict(facecolor='steelblue', shrink=0.05), fontsize=15, color='white') # Decorations xtickvals = [str(m)[:3].upper()+"-"+str(y) for y,m in zip(df.date.dt.year, df.date.dt.month_name())] plt.gca().set_xticks(x[::6]) plt.gca().set_xticklabels(xtickvals[::6], rotation=90, fontdict={'horizontalalignment': 'center', 'verticalalignment': 'center_baseline'}) plt.ylim(-35,35) plt.xlim(1,100) plt.title("Month Economics Return %", fontsize=22) plt.ylabel('Monthly returns %') plt.grid(alpha=0.5) plt.show() 




排名


15.有序直方图


有序直方图有效地传达了元素的排名顺序。 但是,通过在图表上方添加度量值,用户可以从图表本身接收准确的信息。

显示代码
 # Prepare Data df_raw = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") df = df_raw[['cty', 'manufacturer']].groupby('manufacturer').apply(lambda x: x.mean()) df.sort_values('cty', inplace=True) df.reset_index(inplace=True) # Draw plot import matplotlib.patches as patches fig, ax = plt.subplots(figsize=(16,10), facecolor='white', dpi= 80) ax.vlines(x=df.index, ymin=0, ymax=df.cty, color='firebrick', alpha=0.7, linewidth=20) # Annotate Text for i, cty in enumerate(df.cty): ax.text(i, cty+0.5, round(cty, 1), horizontalalignment='center') # Title, Label, Ticks and Ylim ax.set_title('Bar Chart for Highway Mileage', fontdict={'size':22}) ax.set(ylabel='Miles Per Gallon', ylim=(0, 30)) plt.xticks(df.index, df.manufacturer.str.upper(), rotation=60, horizontalalignment='right', fontsize=12) # Add patches to color the X axis labels p1 = patches.Rectangle((.57, -0.005), width=.33, height=.13, alpha=.1, facecolor='green', transform=fig.transFigure) p2 = patches.Rectangle((.124, -0.005), width=.446, height=.13, alpha=.1, facecolor='red', transform=fig.transFigure) fig.add_artist(p1) fig.add_artist(p2) plt.show() 




16.棒棒糖图


棒棒糖图表在视觉上令人愉悦,其功能类似于有序直方图。

显示代码
 # Prepare Data df_raw = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") df = df_raw[['cty', 'manufacturer']].groupby('manufacturer').apply(lambda x: x.mean()) df.sort_values('cty', inplace=True) df.reset_index(inplace=True) # Draw plot fig, ax = plt.subplots(figsize=(16,10), dpi= 80) ax.vlines(x=df.index, ymin=0, ymax=df.cty, color='firebrick', alpha=0.7, linewidth=2) ax.scatter(x=df.index, y=df.cty, s=75, color='firebrick', alpha=0.7) # Title, Label, Ticks and Ylim ax.set_title('Lollipop Chart for Highway Mileage', fontdict={'size':22}) ax.set_ylabel('Miles Per Gallon') ax.set_xticks(df.index) ax.set_xticklabels(df.manufacturer.str.upper(), rotation=60, fontdict={'horizontalalignment': 'right', 'size':12}) ax.set_ylim(0, 30) # Annotate for row in df.itertuples(): ax.text(row.Index, row.cty+.5, s=round(row.cty, 2), horizontalalignment= 'center', verticalalignment='bottom', fontsize=14) plt.show() 




17.带签名的虚线图表


散点图传达了项目的排名。 由于它是沿水平轴对齐的,因此您可以在视觉上评估这些点之间的距离。

显示代码
 # Prepare Data df_raw = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") df = df_raw[['cty', 'manufacturer']].groupby('manufacturer').apply(lambda x: x.mean()) df.sort_values('cty', inplace=True) df.reset_index(inplace=True) # Draw plot fig, ax = plt.subplots(figsize=(16,10), dpi= 80) ax.hlines(y=df.index, xmin=11, xmax=26, color='gray', alpha=0.7, linewidth=1, linestyles='dashdot') ax.scatter(y=df.index, x=df.cty, s=75, color='firebrick', alpha=0.7) # Title, Label, Ticks and Ylim ax.set_title('Dot Plot for Highway Mileage', fontdict={'size':22}) ax.set_xlabel('Miles Per Gallon') ax.set_yticks(df.index) ax.set_yticklabels(df.manufacturer.str.title(), fontdict={'horizontalalignment': 'right'}) ax.set_xlim(10, 27) plt.show() 




18.倾斜的地图


斜率图最适合比较给定人员/对象的“之前”和“之后”位置。

显示代码
 import matplotlib.lines as mlines # Import Data df = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/gdppercap.csv") left_label = [str(c) + ', '+ str(round(y)) for c, y in zip(df.continent, df['1952'])] right_label = [str(c) + ', '+ str(round(y)) for c, y in zip(df.continent, df['1957'])] klass = ['red' if (y1-y2) < 0 else 'green' for y1, y2 in zip(df['1952'], df['1957'])] # draw line # https://stackoverflow.com/questions/36470343/how-to-draw-a-line-with-matplotlib/36479941 def newline(p1, p2, color='black'): ax = plt.gca() l = mlines.Line2D([p1[0],p2[0]], [p1[1],p2[1]], color='red' if p1[1]-p2[1] > 0 else 'green', marker='o', markersize=6) ax.add_line(l) return l fig, ax = plt.subplots(1,1,figsize=(14,14), dpi= 80) # Vertical Lines ax.vlines(x=1, ymin=500, ymax=13000, color='black', alpha=0.7, linewidth=1, linestyles='dotted') ax.vlines(x=3, ymin=500, ymax=13000, color='black', alpha=0.7, linewidth=1, linestyles='dotted') # Points ax.scatter(y=df['1952'], x=np.repeat(1, df.shape[0]), s=10, color='black', alpha=0.7) ax.scatter(y=df['1957'], x=np.repeat(3, df.shape[0]), s=10, color='black', alpha=0.7) # Line Segmentsand Annotation for p1, p2, c in zip(df['1952'], df['1957'], df['continent']): newline([1,p1], [3,p2]) ax.text(1-0.05, p1, c + ', ' + str(round(p1)), horizontalalignment='right', verticalalignment='center', fontdict={'size':14}) ax.text(3+0.05, p2, c + ', ' + str(round(p2)), horizontalalignment='left', verticalalignment='center', fontdict={'size':14}) # 'Before' and 'After' Annotations ax.text(1-0.05, 13000, 'BEFORE', horizontalalignment='right', verticalalignment='center', fontdict={'size':18, 'weight':700}) ax.text(3+0.05, 13000, 'AFTER', horizontalalignment='left', verticalalignment='center', fontdict={'size':18, 'weight':700}) # Decoration ax.set_title("Slopechart: Comparing GDP Per Capita between 1952 vs 1957", fontdict={'size':22}) ax.set(xlim=(0,4), ylim=(0,14000), ylabel='Mean GDP Per Capita') ax.set_xticks([1,3]) ax.set_xticklabels(["1952", "1957"]) plt.yticks(np.arange(500, 13000, 2000), fontsize=12) # Lighten borders plt.gca().spines["top"].set_alpha(.0) plt.gca().spines["bottom"].set_alpha(.0) plt.gca().spines["right"].set_alpha(.0) plt.gca().spines["left"].set_alpha(.0) plt.show() 




19.“哑铃”


“哑铃”图传达了各种影响的“之前”和“之后”位置以及项目的排名顺序。 如果要可视化某些物体在不同对象上的效果,这将非常有用。

显示代码
 import matplotlib.lines as mlines # Import Data df = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/health.csv") df.sort_values('pct_2014', inplace=True) df.reset_index(inplace=True) # Func to draw line segment def newline(p1, p2, color='black'): ax = plt.gca() l = mlines.Line2D([p1[0],p2[0]], [p1[1],p2[1]], color='skyblue') ax.add_line(l) return l # Figure and Axes fig, ax = plt.subplots(1,1,figsize=(14,14), facecolor='#f7f7f7', dpi= 80) # Vertical Lines ax.vlines(x=.05, ymin=0, ymax=26, color='black', alpha=1, linewidth=1, linestyles='dotted') ax.vlines(x=.10, ymin=0, ymax=26, color='black', alpha=1, linewidth=1, linestyles='dotted') ax.vlines(x=.15, ymin=0, ymax=26, color='black', alpha=1, linewidth=1, linestyles='dotted') ax.vlines(x=.20, ymin=0, ymax=26, color='black', alpha=1, linewidth=1, linestyles='dotted') # Points ax.scatter(y=df['index'], x=df['pct_2013'], s=50, color='#0e668b', alpha=0.7) ax.scatter(y=df['index'], x=df['pct_2014'], s=50, color='#a3c4dc', alpha=0.7) # Line Segments for i, p1, p2 in zip(df['index'], df['pct_2013'], df['pct_2014']): newline([p1, i], [p2, i]) # Decoration ax.set_facecolor('#f7f7f7') ax.set_title("Dumbell Chart: Pct Change - 2013 vs 2014", fontdict={'size':22}) ax.set(xlim=(0,.25), ylim=(-1, 27), ylabel='Mean GDP Per Capita') ax.set_xticks([.05, .1, .15, .20]) ax.set_xticklabels(['5%', '15%', '20%', '25%']) ax.set_xticklabels(['5%', '15%', '20%', '25%']) plt.show() 




经销


20.连续变量的直方图


直方图显示此变量的频率分布。 以下演示根据分类变量对频段进行分组。

显示代码
 # Import Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Prepare data x_var = 'displ' groupby_var = 'class' df_agg = df.loc[:, [x_var, groupby_var]].groupby(groupby_var) vals = [df[x_var].values.tolist() for i, df in df_agg] # Draw plt.figure(figsize=(16,9), dpi= 80) colors = [plt.cm.Spectral(i/float(len(vals)-1)) for i in range(len(vals))] n, bins, patches = plt.hist(vals, 30, stacked=True, density=False, color=colors[:len(vals)]) # Decoration plt.legend({group:col for group, col in zip(np.unique(df[groupby_var]).tolist(), colors[:len(vals)])}) plt.title(f"Stacked Histogram of ${x_var}$ colored by ${groupby_var}$", fontsize=22) plt.xlabel(x_var) plt.ylabel("Frequency") plt.ylim(0, 25) plt.xticks(ticks=bins[::3], labels=[round(b,1) for b in bins[::3]]) plt.show() 




21.类别变量的直方图


分类变量的直方图显示了该变量的频率分布。 通过为列着色,您可以可视化与代表颜色的另一个分类变量有关的分布。

显示代码
 # Import Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Prepare data x_var = 'manufacturer' groupby_var = 'class' df_agg = df.loc[:, [x_var, groupby_var]].groupby(groupby_var) vals = [df[x_var].values.tolist() for i, df in df_agg] # Draw plt.figure(figsize=(16,9), dpi= 80) colors = [plt.cm.Spectral(i/float(len(vals)-1)) for i in range(len(vals))] n, bins, patches = plt.hist(vals, df[x_var].unique().__len__(), stacked=True, density=False, color=colors[:len(vals)]) # Decoration plt.legend({group:col for group, col in zip(np.unique(df[groupby_var]).tolist(), colors[:len(vals)])}) plt.title(f"Stacked Histogram of ${x_var}$ colored by ${groupby_var}$", fontsize=22) plt.xlabel(x_var) plt.ylabel("Frequency") plt.ylim(0, 40) plt.xticks(ticks=bins, labels=np.unique(df[x_var]).tolist(), rotation=90, horizontalalignment='left') plt.show() 




22.密度图


密度图是用于可视化连续变量分布的广泛使用的工具。 通过变量“ response”对它们进行分组后,您可以检查X和Y之间的关系。以下是一个示例,如果为了清楚起见,我们描述了城市中的里程分布如何根据汽缸数而变化。

显示代码
 # Import Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Draw Plot plt.figure(figsize=(16,10), dpi= 80) sns.kdeplot(df.loc[df['cyl'] == 4, "cty"], shade=True, color="g", label="Cyl=4", alpha=.7) sns.kdeplot(df.loc[df['cyl'] == 5, "cty"], shade=True, color="deeppink", label="Cyl=5", alpha=.7) sns.kdeplot(df.loc[df['cyl'] == 6, "cty"], shade=True, color="dodgerblue", label="Cyl=6", alpha=.7) sns.kdeplot(df.loc[df['cyl'] == 8, "cty"], shade=True, color="orange", label="Cyl=8", alpha=.7) # Decoration plt.title('Density Plot of City Mileage by n_Cylinders', fontsize=22) plt.legend() plt.show() 




23.带有直方图的密度曲线


带有直方图的密度曲线结合了两个图表发送的摘要信息,因此您可以在一处看到它们。

显示代码
 # Import Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Draw Plot plt.figure(figsize=(13,10), dpi= 80) sns.distplot(df.loc[df['class'] == 'compact', "cty"], color="dodgerblue", label="Compact", hist_kws={'alpha':.7}, kde_kws={'linewidth':3}) sns.distplot(df.loc[df['class'] == 'suv', "cty"], color="orange", label="SUV", hist_kws={'alpha':.7}, kde_kws={'linewidth':3}) sns.distplot(df.loc[df['class'] == 'minivan', "cty"], color="g", label="minivan", hist_kws={'alpha':.7}, kde_kws={'linewidth':3}) plt.ylim(0, 0.35) # Decoration plt.title('Density Plot of City Mileage by Vehicle Type', fontsize=22) plt.legend() plt.show() 




24.喜悦图


Joy图表使您可以重叠不同组的密度曲线,这是一种可视化大量组相对于彼此分布的好方法。它看起来令人愉悦,并且仅传达正确的信息。

显示代码
 # !pip install joypy # Import Data mpg = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Draw Plot plt.figure(figsize=(16,10), dpi= 80) fig, axes = joypy.joyplot(mpg, column=['hwy', 'cty'], by="class", ylim='own', figsize=(14,10)) # Decoration plt.title('Joy Plot of City and Highway Mileage by Class', fontsize=22) plt.show() 




25.分布式散点图


分布式散点图显示了被分成几组的点的一维分布。点越暗,该区域中数据点的集中度越大。通过以不同的方式为中位数着色,组的实际排列会立即变得明显。

显示代码
 import matplotlib.patches as mpatches # Prepare Data df_raw = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") cyl_colors = {4:'tab:red', 5:'tab:green', 6:'tab:blue', 8:'tab:orange'} df_raw['cyl_color'] = df_raw.cyl.map(cyl_colors) # Mean and Median city mileage by make df = df_raw[['cty', 'manufacturer']].groupby('manufacturer').apply(lambda x: x.mean()) df.sort_values('cty', ascending=False, inplace=True) df.reset_index(inplace=True) df_median = df_raw[['cty', 'manufacturer']].groupby('manufacturer').apply(lambda x: x.median()) # Draw horizontal lines fig, ax = plt.subplots(figsize=(16,10), dpi= 80) ax.hlines(y=df.index, xmin=0, xmax=40, color='gray', alpha=0.5, linewidth=.5, linestyles='dashdot') # Draw the Dots for i, make in enumerate(df.manufacturer): df_make = df_raw.loc[df_raw.manufacturer==make, :] ax.scatter(y=np.repeat(i, df_make.shape[0]), x='cty', data=df_make, s=75, edgecolors='gray', c='w', alpha=0.5) ax.scatter(y=i, x='cty', data=df_median.loc[df_median.index==make, :], s=75, c='firebrick') # Annotate ax.text(33, 13, "$red \; dots \; are \; the \: median$", fontdict={'size':12}, color='firebrick') # Decorations red_patch = plt.plot([],[], marker="o", ms=10, ls="", mec=None, color='firebrick', label="Median") plt.legend(handles=red_patch) ax.set_title('Distribution of City Mileage by Make', fontdict={'size':22}) ax.set_xlabel('Miles Per Gallon (City)', alpha=0.7) ax.set_yticks(df.index) ax.set_yticklabels(df.manufacturer.str.title(), fontdict={'horizontalalignment': 'right'}, alpha=0.7) ax.set_xlim(1, 40) plt.xticks(alpha=0.7) plt.gca().spines["top"].set_visible(False) plt.gca().spines["bottom"].set_visible(False) plt.gca().spines["right"].set_visible(False) plt.gca().spines["left"].set_visible(False) plt.grid(axis='both', alpha=.4, linewidth=.1) plt.show() 




26.带有矩形的图表


这样的图表是可视化分布的一种很好的方法,可以了解中位数,第25、75、15位和第25位,高位和低位。但是,在解释字段的大小时应该小心,这可能会扭曲该组中包含的点数。因此,手动指示每个单元中的观察次数将有助于克服此缺点。

例如,左侧的前两个矩形的大小相同,尽管它们分别具有5和47个数据元素。因此,有必要注意观察次数。

显示代码
 # Import Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Draw Plot plt.figure(figsize=(13,10), dpi= 80) sns.boxplot(x='class', y='hwy', data=df, notch=False) # Add N Obs inside boxplot (optional) def add_n_obs(df,group_col,y): medians_dict = {grp[0]:grp[1][y].median() for grp in df.groupby(group_col)} xticklabels = [x.get_text() for x in plt.gca().get_xticklabels()] n_obs = df.groupby(group_col)[y].size().values for (x, xticklabel), n_ob in zip(enumerate(xticklabels), n_obs): plt.text(x, medians_dict[xticklabel]*1.01, "#obs : "+str(n_ob), horizontalalignment='center', fontdict={'size':14}, color='white') add_n_obs(df,group_col='class',y='hwy') # Decoration plt.title('Box Plot of Highway Mileage by Vehicle Class', fontsize=22) plt.ylim(10, 40) plt.show() 




27.带有矩形和点的图表


点+箱图可将类似的信息(如箱图)分为几组。另外,点表示每个组中数据元素的数量。

显示代码
 # Import Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Draw Plot plt.figure(figsize=(13,10), dpi= 80) sns.boxplot(x='class', y='hwy', data=df, hue='cyl') sns.stripplot(x='class', y='hwy', data=df, color='black', size=3, jitter=1) for i in range(len(df['class'].unique())-1): plt.vlines(i+.5, 10, 45, linestyles='solid', colors='gray', alpha=0.2) # Decoration plt.title('Box Plot of Highway Mileage by Vehicle Class', fontsize=22) plt.legend(title='Cylinders') plt.show() 




28.附表“小提琴”


此类计划表是箱形图的视觉替代方案。“小提琴”的形状或面积取决于该组中的数据量。但是,这样的图形可能更难以阅读,并且通常不在专业设置中使用。

显示代码
 # Import Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Draw Plot plt.figure(figsize=(13,10), dpi= 80) sns.violinplot(x='class', y='hwy', data=df, scale='width', inner='quartile') # Decoration plt.title('Violin Plot of Highway Mileage by Vehicle Class', fontsize=22) plt.show() 




29.人口金字塔


人口金字塔可用于显示按数量排序的组的分布,或显示人口的分阶段过滤,如下所示,以可视化多少人通过营销渠道的每个阶段。

显示代码
 # Read data df = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/email_campaign_funnel.csv") # Draw Plot plt.figure(figsize=(13,10), dpi= 80) group_col = 'Gender' order_of_bars = df.Stage.unique()[::-1] colors = [plt.cm.Spectral(i/float(len(df[group_col].unique())-1)) for i in range(len(df[group_col].unique()))] for c, group in zip(colors, df[group_col].unique()): sns.barplot(x='Users', y='Stage', data=df.loc[df[group_col]==group, :], order=order_of_bars, color=c, label=group) # Decorations plt.xlabel("$Users$") plt.ylabel("Stage of Purchase") plt.yticks(fontsize=12) plt.title("Population Pyramid of the Marketing Funnel", fontsize=22) plt.legend() plt.show() 




30.分类图


seaborn库提供的分类图可用于可视化两个或多个分类变量相对于彼此的数量分布。

显示代码
 # Load Dataset titanic = sns.load_dataset("titanic") # Plot g = sns.catplot("alive", col="deck", col_wrap=4, data=titanic[titanic.deck.notnull()], kind="count", height=3.5, aspect=.8, palette='tab20') fig.suptitle('sf') plt.show() 



显示代码
 # Load Dataset titanic = sns.load_dataset("titanic") # Plot sns.catplot(x="age", y="embark_town", hue="sex", col="class", data=titanic[titanic.embark_town.notnull()], orient="h", height=5, aspect=1, palette="tab10", kind="violin", dodge=True, cut=0, bw=.2) 




组装,组成


31.华夫饼图


可以使用pywaffle软件包创建一个华夫饼图,并用于显示大多数人群中的组组成。

显示代码
 #! pip install pywaffle # Reference: https://stackoverflow.com/questions/41400136/how-to-do-waffle-charts-in-python-square-piechart from pywaffle import Waffle # Import df_raw = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Prepare Data df = df_raw.groupby('class').size().reset_index(name='counts') n_categories = df.shape[0] colors = [plt.cm.inferno_r(i/float(n_categories)) for i in range(n_categories)] # Draw Plot and Decorate fig = plt.figure( FigureClass=Waffle, plots={ '111': { 'values': df['counts'], 'labels': ["{0} ({1})".format(n[0], n[1]) for n in df[['class', 'counts']].itertuples()], 'legend': {'loc': 'upper left', 'bbox_to_anchor': (1.05, 1), 'fontsize': 12}, 'title': {'label': '# Vehicles by Class', 'loc': 'center', 'fontsize':18} }, }, rows=7, colors=colors, figsize=(16, 9) ) 



显示代码
 #! pip install pywaffle from pywaffle import Waffle # Import # df_raw = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Prepare Data # By Class Data df_class = df_raw.groupby('class').size().reset_index(name='counts_class') n_categories = df_class.shape[0] colors_class = [plt.cm.Set3(i/float(n_categories)) for i in range(n_categories)] # By Cylinders Data df_cyl = df_raw.groupby('cyl').size().reset_index(name='counts_cyl') n_categories = df_cyl.shape[0] colors_cyl = [plt.cm.Spectral(i/float(n_categories)) for i in range(n_categories)] # By Make Data df_make = df_raw.groupby('manufacturer').size().reset_index(name='counts_make') n_categories = df_make.shape[0] colors_make = [plt.cm.tab20b(i/float(n_categories)) for i in range(n_categories)] # Draw Plot and Decorate fig = plt.figure( FigureClass=Waffle, plots={ '311': { 'values': df_class['counts_class'], 'labels': ["{1}".format(n[0], n[1]) for n in df_class[['class', 'counts_class']].itertuples()], 'legend': {'loc': 'upper left', 'bbox_to_anchor': (1.05, 1), 'fontsize': 12, 'title':'Class'}, 'title': {'label': '# Vehicles by Class', 'loc': 'center', 'fontsize':18}, 'colors': colors_class }, '312': { 'values': df_cyl['counts_cyl'], 'labels': ["{1}".format(n[0], n[1]) for n in df_cyl[['cyl', 'counts_cyl']].itertuples()], 'legend': {'loc': 'upper left', 'bbox_to_anchor': (1.05, 1), 'fontsize': 12, 'title':'Cyl'}, 'title': {'label': '# Vehicles by Cyl', 'loc': 'center', 'fontsize':18}, 'colors': colors_cyl }, '313': { 'values': df_make['counts_make'], 'labels': ["{1}".format(n[0], n[1]) for n in df_make[['manufacturer', 'counts_make']].itertuples()], 'legend': {'loc': 'upper left', 'bbox_to_anchor': (1.05, 1), 'fontsize': 12, 'title':'Manufacturer'}, 'title': {'label': '# Vehicles by Make', 'loc': 'center', 'fontsize':18}, 'colors': colors_make } }, rows=9, figsize=(16, 14) ) 




32.饼图


饼图是显示组组成的经典方法。但是,当前通常不建议使用此图,因为段的面积有时会产生误导。因此,如果要使用饼图,强烈建议您明确记录饼图各部分的百分比或数字。

显示代码
 # Import df_raw = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Prepare Data df = df_raw.groupby('class').size() # Make the plot with pandas df.plot(kind='pie', subplots=True, figsize=(8, 8), dpi= 80) plt.title("Pie Chart of Vehicle Class - Bad") plt.ylabel("") plt.show() 



显示代码
 # Import df_raw = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Prepare Data df = df_raw.groupby('class').size().reset_index(name='counts') # Draw Plot fig, ax = plt.subplots(figsize=(12, 7), subplot_kw=dict(aspect="equal"), dpi= 80) data = df['counts'] categories = df['class'] explode = [0,0,0,0,0,0.1,0] def func(pct, allvals): absolute = int(pct/100.*np.sum(allvals)) return "{:.1f}% ({:d} )".format(pct, absolute) wedges, texts, autotexts = ax.pie(data, autopct=lambda pct: func(pct, data), textprops=dict(color="w"), colors=plt.cm.Dark2.colors, startangle=140, explode=explode) # Decoration ax.legend(wedges, categories, title="Vehicle Class", loc="center left", bbox_to_anchor=(1, 0, 0.5, 1)) plt.setp(autotexts, size=10, weight=700) ax.set_title("Class of Vehicles: Pie Chart") plt.show() 




33.树状图


树形图看起来像饼图,并且效果更好,不会误导每个组的份额。

显示代码
 # pip install squarify import squarify # Import Data df_raw = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Prepare Data df = df_raw.groupby('class').size().reset_index(name='counts') labels = df.apply(lambda x: str(x[0]) + "\n (" + str(x[1]) + ")", axis=1) sizes = df['counts'].values.tolist() colors = [plt.cm.Spectral(i/float(len(labels))) for i in range(len(labels))] # Draw Plot plt.figure(figsize=(12,8), dpi= 80) squarify.plot(sizes=sizes, label=labels, color=colors, alpha=.8) # Decorate plt.title('Treemap of Vechile Class') plt.axis('off') plt.show() 




34.直方图


直方图是基于数量或任何给定指标可视化元素的经典方法。在下图中,我为每个元素使用了不同的颜色,但是如果您不想对它们进行成组着色,则可以为所有元素选择一种颜色。颜色名称存储在以下代码中的all_colors内部。您可以通过在.plt.plot()中设置color参数来更改条纹的颜色

显示代码
 import random # Import Data df_raw = pd.read_csv("https://github.com/selva86/datasets/raw/master/mpg_ggplot2.csv") # Prepare Data df = df_raw.groupby('manufacturer').size().reset_index(name='counts') n = df['manufacturer'].unique().__len__()+1 all_colors = list(plt.cm.colors.cnames.keys()) random.seed(100) c = random.choices(all_colors, k=n) # Plot Bars plt.figure(figsize=(16,10), dpi= 80) plt.bar(df['manufacturer'], df['counts'], color=c, width=.5) for i, val in enumerate(df['counts'].values): plt.text(i, val, float(val), horizontalalignment='center', verticalalignment='bottom', fontdict={'fontweight':500, 'size':12}) # Decoration plt.gca().set_xticklabels(df['manufacturer'], rotation=60, horizontalalignment= 'right') plt.title("Number of Vehicles by Manaufacturers", fontsize=22) plt.ylabel('# Vehicles') plt.ylim(0, 45) plt.show() 




变更追踪


35.时间序列图


时间序列图用于可视化给定指标随时间的变化。在这里,您可以了解从1949年到1969年的旅客流量如何变化。

显示代码
 # Import Data df = pd.read_csv('https://github.com/selva86/datasets/raw/master/AirPassengers.csv') # Draw Plot plt.figure(figsize=(16,10), dpi= 80) plt.plot('date', 'traffic', data=df, color='tab:red') # Decoration plt.ylim(50, 750) xtick_location = df.index.tolist()[::12] xtick_labels = [x[-4:] for x in df.date.tolist()[::12]] plt.xticks(ticks=xtick_location, labels=xtick_labels, rotation=0, fontsize=12, horizontalalignment='center', alpha=.7) plt.yticks(fontsize=12, alpha=.7) plt.title("Air Passengers Traffic (1949 - 1969)", fontsize=22) plt.grid(axis='both', alpha=.3) # Remove borders plt.gca().spines["top"].set_alpha(0.0) plt.gca().spines["bottom"].set_alpha(0.3) plt.gca().spines["right"].set_alpha(0.0) plt.gca().spines["left"].set_alpha(0.3) plt.show() 




36.有峰和谷的时间序列


下面的时间序列显示所有高峰和低谷,并标记各个特殊事件的发生。

显示代码
 # Import Data df = pd.read_csv('https://github.com/selva86/datasets/raw/master/AirPassengers.csv') # Get the Peaks and Troughs data = df['traffic'].values doublediff = np.diff(np.sign(np.diff(data))) peak_locations = np.where(doublediff == -2)[0] + 1 doublediff2 = np.diff(np.sign(np.diff(-1*data))) trough_locations = np.where(doublediff2 == -2)[0] + 1 # Draw Plot plt.figure(figsize=(16,10), dpi= 80) plt.plot('date', 'traffic', data=df, color='tab:blue', label='Air Traffic') plt.scatter(df.date[peak_locations], df.traffic[peak_locations], marker=mpl.markers.CARETUPBASE, color='tab:green', s=100, label='Peaks') plt.scatter(df.date[trough_locations], df.traffic[trough_locations], marker=mpl.markers.CARETDOWNBASE, color='tab:red', s=100, label='Troughs') # Annotate for t, p in zip(trough_locations[1::5], peak_locations[::3]): plt.text(df.date[p], df.traffic[p]+15, df.date[p], horizontalalignment='center', color='darkgreen') plt.text(df.date[t], df.traffic[t]-35, df.date[t], horizontalalignment='center', color='darkred') # Decoration plt.ylim(50,750) xtick_location = df.index.tolist()[::6] xtick_labels = df.date.tolist()[::6] plt.xticks(ticks=xtick_location, labels=xtick_labels, rotation=90, fontsize=12, alpha=.7) plt.title("Peak and Troughs of Air Passengers Traffic (1949 - 1969)", fontsize=22) plt.yticks(fontsize=12, alpha=.7) # Lighten borders plt.gca().spines["top"].set_alpha(.0) plt.gca().spines["bottom"].set_alpha(.3) plt.gca().spines["right"].set_alpha(.0) plt.gca().spines["left"].set_alpha(.3) plt.legend(loc='upper left') plt.grid(axis='y', alpha=.3) plt.show() 




37. (ACF) (PACF)


ACF图显示了时间序列与其自身时间的相关性。从时间0开始,每条垂直线(在自相关图上)都表示该系列与其时间之间的相关性。图上的蓝色阴影区域表示显着性水平。蓝线上方的那些时刻很重要。

那么您如何解释呢?

对于AirPassengers,我们看到在x = 14时,“棒棒糖”越过了蓝线,因此非常重要。这意味着直到14年前观察到的客运量都会对今天观察到的客运量产生影响。

另一方面,PACF显示任何给定时间(时间序列)与当前序列的自相关,但消除了它们之间的影响。

显示代码
 from statsmodels.graphics.tsaplots import plot_acf, plot_pacf # Import Data df = pd.read_csv('https://github.com/selva86/datasets/raw/master/AirPassengers.csv') # Draw Plot fig, (ax1, ax2) = plt.subplots(1, 2,figsize=(16,6), dpi= 80) plot_acf(df.traffic.tolist(), ax=ax1, lags=50) plot_pacf(df.traffic.tolist(), ax=ax2, lags=20) # Decorate # lighten the borders ax1.spines["top"].set_alpha(.3); ax2.spines["top"].set_alpha(.3) ax1.spines["bottom"].set_alpha(.3); ax2.spines["bottom"].set_alpha(.3) ax1.spines["right"].set_alpha(.3); ax2.spines["right"].set_alpha(.3) ax1.spines["left"].set_alpha(.3); ax2.spines["left"].set_alpha(.3) # font size of tick labels ax1.tick_params(axis='both', labelsize=12) ax2.tick_params(axis='both', labelsize=12) plt.show() 




38.互相关图


互相关图显示了两个时间序列的延迟。

显示代码
 import statsmodels.tsa.stattools as stattools # Import Data df = pd.read_csv('https://github.com/selva86/datasets/raw/master/mortality.csv') x = df['mdeaths'] y = df['fdeaths'] # Compute Cross Correlations ccs = stattools.ccf(x, y)[:100] nlags = len(ccs) # Compute the Significance level # ref: https://stats.stackexchange.com/questions/3115/cross-correlation-significance-in-r/3128#3128 conf_level = 2 / np.sqrt(nlags) # Draw Plot plt.figure(figsize=(12,7), dpi= 80) plt.hlines(0, xmin=0, xmax=100, color='gray') # 0 axis plt.hlines(conf_level, xmin=0, xmax=100, color='gray') plt.hlines(-conf_level, xmin=0, xmax=100, color='gray') plt.bar(x=np.arange(len(ccs)), height=ccs, width=.3) # Decoration plt.title('$Cross\; Correlation\; Plot:\; mdeaths\; vs\; fdeaths$', fontsize=22) plt.xlim(0,len(ccs)) plt.show() 




39.扩展时间序列


时间序列扩展图显示了将时间序列细分为趋势,季节和残差成分的信息。

显示代码
 from statsmodels.tsa.seasonal import seasonal_decompose from dateutil.parser import parse # Import Data df = pd.read_csv('https://github.com/selva86/datasets/raw/master/AirPassengers.csv') dates = pd.DatetimeIndex([parse(d).strftime('%Y-%m-01') for d in df['date']]) df.set_index(dates, inplace=True) # Decompose result = seasonal_decompose(df['traffic'], model='multiplicative') # Plot plt.rcParams.update({'figure.figsize': (10,10)}) result.plot().suptitle('Time Series Decomposition of Air Passengers') plt.show() 




40.几个时间序列


您可以构建多个在单个图表上测量相同值的时间序列,如下所示。

显示代码
 # Import Data df = pd.read_csv('https://github.com/selva86/datasets/raw/master/mortality.csv') # Define the upper limit, lower limit, interval of Y axis and colors y_LL = 100 y_UL = int(df.iloc[:, 1:].max().max()*1.1) y_interval = 400 mycolors = ['tab:red', 'tab:blue', 'tab:green', 'tab:orange'] # Draw Plot and Annotate fig, ax = plt.subplots(1,1,figsize=(16, 9), dpi= 80) columns = df.columns[1:] for i, column in enumerate(columns): plt.plot(df.date.values, df .values, lw=1.5, color=mycolors[i]) plt.text(df.shape[0]+1, df .values[-1], column, fontsize=14, color=mycolors[i]) # Draw Tick lines for y in range(y_LL, y_UL, y_interval): plt.hlines(y, xmin=0, xmax=71, colors='black', alpha=0.3, linestyles="--", lw=0.5) # Decorations plt.tick_params(axis="both", which="both", bottom=False, top=False, labelbottom=True, left=False, right=False, labelleft=True) # Lighten borders plt.gca().spines["top"].set_alpha(.3) plt.gca().spines["bottom"].set_alpha(.3) plt.gca().spines["right"].set_alpha(.3) plt.gca().spines["left"].set_alpha(.3) plt.title('Number of Deaths from Lung Diseases in the UK (1974-1979)', fontsize=22) plt.yticks(range(y_LL, y_UL, y_interval), [str(y) for y in range(y_LL, y_UL, y_interval)], fontsize=12) plt.xticks(range(0, df.shape[0], 12), df.date.values[::12], horizontalalignment='left', fontsize=12) plt.ylim(y_LL, y_UL) plt.xlim(-2, 80) plt.show() 




41.使用次要Y轴以不同比例构建


如果要显示同时测量两个不同值的两个时间序列,则可以在右侧的次要Y轴上再次构建第二个时间序列。

显示代码
 # Import Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/economics.csv") x = df['date'] y1 = df['psavert'] y2 = df['unemploy'] # Plot Line1 (Left Y Axis) fig, ax1 = plt.subplots(1,1,figsize=(16,9), dpi= 80) ax1.plot(x, y1, color='tab:red') # Plot Line2 (Right Y Axis) ax2 = ax1.twinx() # instantiate a second axes that shares the same x-axis ax2.plot(x, y2, color='tab:blue') # Decorations # ax1 (left Y axis) ax1.set_xlabel('Year', fontsize=20) ax1.tick_params(axis='x', rotation=0, labelsize=12) ax1.set_ylabel('Personal Savings Rate', color='tab:red', fontsize=20) ax1.tick_params(axis='y', rotation=0, labelcolor='tab:red' ) ax1.grid(alpha=.4) # ax2 (right Y axis) ax2.set_ylabel("# Unemployed (1000's)", color='tab:blue', fontsize=20) ax2.tick_params(axis='y', labelcolor='tab:blue') ax2.set_xticks(np.arange(0, len(x), 60)) ax2.set_xticklabels(x[::60], rotation=90, fontdict={'fontsize':10}) ax2.set_title("Personal Savings Rate vs Unemployed: Plotting in Secondary Y Axis", fontsize=22) fig.tight_layout() plt.show() 




42.带有误差线的时间序列


如果您有一个时间序列数据集,并且每个时间点(日期/时间戳)具有多个观测值,则可以构建带有误差线的时间序列。您可以在下面看到一些基于一天中不同时间的订单收据的示例。另一个例子是45天内收到的订单数量。

通过这种方法,平均订单数由白线表示。95%的间隔被计算并围绕平均值绘制。

显示代码
 from scipy.stats import sem # Import Data df = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/user_orders_hourofday.csv") df_mean = df.groupby('order_hour_of_day').quantity.mean() df_se = df.groupby('order_hour_of_day').quantity.apply(sem).mul(1.96) # Plot plt.figure(figsize=(16,10), dpi= 80) plt.ylabel("# Orders", fontsize=16) x = df_mean.index plt.plot(x, df_mean, color="white", lw=2) plt.fill_between(x, df_mean - df_se, df_mean + df_se, color="#3F5D7D") # Decorations # Lighten borders plt.gca().spines["top"].set_alpha(0) plt.gca().spines["bottom"].set_alpha(1) plt.gca().spines["right"].set_alpha(0) plt.gca().spines["left"].set_alpha(1) plt.xticks(x[::2], [str(d) for d in x[::2]] , fontsize=12) plt.title("User Orders by Hour of Day (95% confidence)", fontsize=22) plt.xlabel("Hour of Day") s, e = plt.gca().get_xlim() plt.xlim(s, e) # Draw Horizontal Tick lines for y in range(8, 20, 2): plt.hlines(y, xmin=s, xmax=e, colors='black', alpha=0.5, linestyles="--", lw=0.5) plt.show() 



显示代码
 "Data Source: https://www.kaggle.com/olistbr/brazilian-ecommerce#olist_orders_dataset.csv" from dateutil.parser import parse from scipy.stats import sem # Import Data df_raw = pd.read_csv('https://raw.githubusercontent.com/selva86/datasets/master/orders_45d.csv', parse_dates=['purchase_time', 'purchase_date']) # Prepare Data: Daily Mean and SE Bands df_mean = df_raw.groupby('purchase_date').quantity.mean() df_se = df_raw.groupby('purchase_date').quantity.apply(sem).mul(1.96) # Plot plt.figure(figsize=(16,10), dpi= 80) plt.ylabel("# Daily Orders", fontsize=16) x = [d.date().strftime('%Y-%m-%d') for d in df_mean.index] plt.plot(x, df_mean, color="white", lw=2) plt.fill_between(x, df_mean - df_se, df_mean + df_se, color="#3F5D7D") # Decorations # Lighten borders plt.gca().spines["top"].set_alpha(0) plt.gca().spines["bottom"].set_alpha(1) plt.gca().spines["right"].set_alpha(0) plt.gca().spines["left"].set_alpha(1) plt.xticks(x[::6], [str(d) for d in x[::6]] , fontsize=12) plt.title("Daily Order Quantity of Brazilian Retail with Error Bands (95% confidence)", fontsize=20) # Axis limits s, e = plt.gca().get_xlim() plt.xlim(s, e-2) plt.ylim(4, 10) # Draw Horizontal Tick lines for y in range(5, 10, 1): plt.hlines(y, xmin=s, xmax=e, colors='black', alpha=0.5, linestyles="--", lw=0.5) plt.show() 




43.累积图表


堆叠的面积图直观地表示了多个时间序列的贡献率。

显示代码
 # Import Data df = pd.read_csv('https://raw.githubusercontent.com/selva86/datasets/master/nightvisitors.csv') # Decide Colors mycolors = ['tab:red', 'tab:blue', 'tab:green', 'tab:orange', 'tab:brown', 'tab:grey', 'tab:pink', 'tab:olive'] # Draw Plot and Annotate fig, ax = plt.subplots(1,1,figsize=(16, 9), dpi= 80) columns = df.columns[1:] labs = columns.values.tolist() # Prepare data x = df['yearmon'].values.tolist() y0 = df[columns[0]].values.tolist() y1 = df[columns[1]].values.tolist() y2 = df[columns[2]].values.tolist() y3 = df[columns[3]].values.tolist() y4 = df[columns[4]].values.tolist() y5 = df[columns[5]].values.tolist() y6 = df[columns[6]].values.tolist() y7 = df[columns[7]].values.tolist() y = np.vstack([y0, y2, y4, y6, y7, y5, y1, y3]) # Plot for each column labs = columns.values.tolist() ax = plt.gca() ax.stackplot(x, y, labels=labs, colors=mycolors, alpha=0.8) # Decorations ax.set_title('Night Visitors in Australian Regions', fontsize=18) ax.set(ylim=[0, 100000]) ax.legend(fontsize=10, ncol=4) plt.xticks(x[::5], fontsize=10, horizontalalignment='center') plt.yticks(np.arange(10000, 100000, 20000), fontsize=10) plt.xlim(x[0], x[-1]) # Lighten borders plt.gca().spines["top"].set_alpha(0) plt.gca().spines["bottom"].set_alpha(.3) plt.gca().spines["right"].set_alpha(0) plt.gca().spines["left"].set_alpha(.3) plt.show() 




44.区域图未堆叠


开放区域图用于可视化两行或更多行相对于彼此的进度(上下波动)。在下面的图表中,您可以清楚地看到个人储蓄率随着平均失业时间的增加而降低。带有空心截面的图表很好地说明了这种现象。

显示代码
 # Import Data df = pd.read_csv("https://github.com/selva86/datasets/raw/master/economics.csv") # Prepare Data x = df['date'].values.tolist() y1 = df['psavert'].values.tolist() y2 = df['uempmed'].values.tolist() mycolors = ['tab:red', 'tab:blue', 'tab:green', 'tab:orange', 'tab:brown', 'tab:grey', 'tab:pink', 'tab:olive'] columns = ['psavert', 'uempmed'] # Draw Plot fig, ax = plt.subplots(1, 1, figsize=(16,9), dpi= 80) ax.fill_between(x, y1=y1, y2=0, label=columns[1], alpha=0.5, color=mycolors[1], linewidth=2) ax.fill_between(x, y1=y2, y2=0, label=columns[0], alpha=0.5, color=mycolors[0], linewidth=2) # Decorations ax.set_title('Personal Savings Rate vs Median Duration of Unemployment', fontsize=18) ax.set(ylim=[0, 30]) ax.legend(loc='best', fontsize=12) plt.xticks(x[::50], fontsize=10, horizontalalignment='center') plt.yticks(np.arange(2.5, 30.0, 2.5), fontsize=10) plt.xlim(-10, x[-1]) # Draw Tick lines for y in np.arange(2.5, 30.0, 2.5): plt.hlines(y, xmin=0, xmax=len(x), colors='black', alpha=0.3, linestyles="--", lw=0.5) # Lighten borders plt.gca().spines["top"].set_alpha(0) plt.gca().spines["bottom"].set_alpha(.3) plt.gca().spines["right"].set_alpha(0) plt.gca().spines["left"].set_alpha(.3) plt.show() 




45.日历热图


日历地图是用于与时间序列相比基于时间可视化数据的一种替代方法,而不是首选方法。尽管它们可能在视觉上吸引人,但这些数值并不完全明显。

显示代码
 import matplotlib as mpl import calmap # Import Data df = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/yahoo.csv", parse_dates=['date']) df.set_index('date', inplace=True) # Plot plt.figure(figsize=(16,10), dpi= 80) calmap.calendarplot(df['2014']['VIX.Close'], fig_kws={'figsize': (16,10)}, yearlabel_kws={'color':'black', 'fontsize':14}, subplot_kws={'title':'Yahoo Stock Prices'}) plt.show() 




46.季节性图表


季节性时间表可用于比较上一个季节在同一天执行的时间序列(年/月/周等)。

显示代码
 from dateutil.parser import parse # Import Data df = pd.read_csv('https://github.com/selva86/datasets/raw/master/AirPassengers.csv') # Prepare data df['year'] = [parse(d).year for d in df.date] df['month'] = [parse(d).strftime('%b') for d in df.date] years = df['year'].unique() # Draw Plot mycolors = ['tab:red', 'tab:blue', 'tab:green', 'tab:orange', 'tab:brown', 'tab:grey', 'tab:pink', 'tab:olive', 'deeppink', 'steelblue', 'firebrick', 'mediumseagreen'] plt.figure(figsize=(16,10), dpi= 80) for i, y in enumerate(years): plt.plot('month', 'traffic', data=df.loc[df.year==y, :], color=mycolors[i], label=y) plt.text(df.loc[df.year==y, :].shape[0]-.9, df.loc[df.year==y, 'traffic'][-1:].values[0], y, fontsize=12, color=mycolors[i]) # Decoration plt.ylim(50,750) plt.xlim(-0.3, 11) plt.ylabel('$Air Traffic$') plt.yticks(fontsize=12, alpha=.7) plt.title("Monthly Seasonal Plot: Air Passengers Traffic (1949 - 1969)", fontsize=22) plt.grid(axis='y', alpha=.3) # Remove borders plt.gca().spines["top"].set_alpha(0.0) plt.gca().spines["bottom"].set_alpha(0.5) plt.gca().spines["right"].set_alpha(0.0) plt.gca().spines["left"].set_alpha(0.5) # plt.legend(loc='upper right', ncol=2, fontsize=12) plt.show() 




团体


47.树状图


树状图根据给定的距离度量对相似的点进行分组,并根据这些点的相似性以树链接的形式排列它们。

显示代码
 import scipy.cluster.hierarchy as shc # Import Data df = pd.read_csv('https://raw.githubusercontent.com/selva86/datasets/master/USArrests.csv') # Plot plt.figure(figsize=(16, 10), dpi= 80) plt.title("USArrests Dendograms", fontsize=22) dend = shc.dendrogram(shc.linkage(df[['Murder', 'Assault', 'UrbanPop', 'Rape']], method='ward'), labels=df.State.values, color_threshold=100) plt.xticks(fontsize=12) plt.show() 




48.集群图


聚类图可用于区分属于一个聚类的点。以下是基于USArrests数据集将美国各州分为5个组的说明性示例。该聚类图使用“ kill”和“ attack”列作为X和Y轴,也可以将第一个至主要组件用作X和Y轴。

显示代码
 from sklearn.cluster import AgglomerativeClustering from scipy.spatial import ConvexHull # Import Data df = pd.read_csv('https://raw.githubusercontent.com/selva86/datasets/master/USArrests.csv') # Agglomerative Clustering cluster = AgglomerativeClustering(n_clusters=5, affinity='euclidean', linkage='ward') cluster.fit_predict(df[['Murder', 'Assault', 'UrbanPop', 'Rape']]) # Plot plt.figure(figsize=(14, 10), dpi= 80) plt.scatter(df.iloc[:,0], df.iloc[:,1], c=cluster.labels_, cmap='tab10') # Encircle def encircle(x,y, ax=None, **kw): if not ax: ax=plt.gca() p = np.c_[x,y] hull = ConvexHull(p) poly = plt.Polygon(p[hull.vertices,:], **kw) ax.add_patch(poly) # Draw polygon surrounding vertices encircle(df.loc[cluster.labels_ == 0, 'Murder'], df.loc[cluster.labels_ == 0, 'Assault'], ec="k", fc="gold", alpha=0.2, linewidth=0) encircle(df.loc[cluster.labels_ == 1, 'Murder'], df.loc[cluster.labels_ == 1, 'Assault'], ec="k", fc="tab:blue", alpha=0.2, linewidth=0) encircle(df.loc[cluster.labels_ == 2, 'Murder'], df.loc[cluster.labels_ == 2, 'Assault'], ec="k", fc="tab:red", alpha=0.2, linewidth=0) encircle(df.loc[cluster.labels_ == 3, 'Murder'], df.loc[cluster.labels_ == 3, 'Assault'], ec="k", fc="tab:green", alpha=0.2, linewidth=0) encircle(df.loc[cluster.labels_ == 4, 'Murder'], df.loc[cluster.labels_ == 4, 'Assault'], ec="k", fc="tab:orange", alpha=0.2, linewidth=0) # Decorations plt.xlabel('Murder'); plt.xticks(fontsize=12) plt.ylabel('Assault'); plt.yticks(fontsize=12) plt.title('Agglomerative Clustering of USArrests (5 Groups)', fontsize=22) plt.show() 




49.安德鲁斯曲线


安德鲁斯曲线有助于根据给定的分组可视化分组中固有的数字特征是否存在。如果对象(数据集中的列)不能帮助区分组,则行将不能很好地分开,如下所示

显示代码
 from pandas.plotting import andrews_curves # Import df = pd.read_csv("https://github.com/selva86/datasets/raw/master/mtcars.csv") df.drop(['cars', 'carname'], axis=1, inplace=True) # Plot plt.figure(figsize=(12,9), dpi= 80) andrews_curves(df, 'cyl', colormap='Set1') # Lighten borders plt.gca().spines["top"].set_alpha(0) plt.gca().spines["bottom"].set_alpha(.3) plt.gca().spines["right"].set_alpha(0) plt.gca().spines["left"].set_alpha(.3) plt.title('Andrews Curves of mtcars', fontsize=22) plt.xlim(-3,3) plt.grid(alpha=0.3) plt.xticks(fontsize=12) plt.yticks(fontsize=12) plt.show() 




50.平行坐标


平行坐标有助于可视化某个功能是否有助于有效地分离组。如果发生隔离,则此功能可能对于预测该组非常有用。

显示代码
 from pandas.plotting import parallel_coordinates # Import Data df_final = pd.read_csv("https://raw.githubusercontent.com/selva86/datasets/master/diamonds_filter.csv") # Plot plt.figure(figsize=(12,9), dpi= 80) parallel_coordinates(df_final, 'cut', colormap='Dark2') # Lighten borders plt.gca().spines["top"].set_alpha(0) plt.gca().spines["bottom"].set_alpha(.3) plt.gca().spines["right"].set_alpha(0) plt.gca().spines["left"].set_alpha(.3) plt.title('Parallel Coordinated of Diamonds', fontsize=22) plt.grid(alpha=0.3) plt.xticks(fontsize=12) plt.yticks(fontsize=12) plt.show() 




木星的奖金代码

鹅,你答应了共鸣!
文章中,我说过我正在考虑进行流体模拟。但是可能我的同事会写它,如果他的文章出了沙盒,我将与在评论或对话框中写那些文章的人共享一个链接。

Source: https://habr.com/ru/post/zh-CN468295/


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