Matplotlib堆叠的条形图具有类似于pgfplots的单个边缘颜色

科莫多瓦兰_

我有一些堆叠的条形图，看起来可能像这样

但是我真的很喜欢边缘颜色跟随其他颜色，例如pgfplots

Matplotlib是否有可能（在合理范围内）？

import numpy as np
import matplotlib.pyplot as plt
import pandas as pd

test1 = np.array([51, 13.8, 15.5, np.NaN])
test2 = np.array([40.3, 30.4, 13.8, 15.5])

df = pd.DataFrame(dict(test1 = test1,
                       test2 = test2),
                  columns = ["test1","test2"]).T

ax = df.plot.barh(stacked = True, cmap = "coolwarm", edgecolor = "black", lw = 1, width = 0.8, figsize = (6,4))
plt.show()

戴维

首先，条形图的边缘为黑色，因为您已将设置edgecolor = "black"为df.plot.barh。删除此意味着没有边色。您需要将每个条的edgecolor设置为bar facecolor的

您可以通过矩形补丁（使用迭代获得做到这一点ax.patches），并使用edgecolor设置为facecolorget_facecolor()和set_edgecolor()。

test1 = np.array([51, 13.8, 15.5, np.NaN])
test2 = np.array([40.3, 30.4, 13.8, 15.5])

df = pd.DataFrame(dict(test1 = test1,
                       test2 = test2),
                  columns = ["test1","test2"]).T

ax = df.plot.barh(stacked = True, cmap = "coolwarm", lw = 1.5, width = 0.8, figsize = (6,4))

for rect in ax.patches:
    facecolor = list(rect.get_facecolor())
    rect.set_edgecolor(facecolor)

    facecolor[-1] = 0.5  # reduce alpha value of facecolor, but not of edgecolor
    rect.set_facecolor(facecolor)

plt.show()