pandas 堆积的条形图复制了大图例的颜色 [英] Pandas stacked bar chart duplicates colors for large legends

问题描述

我需要创建具有大量(大约10个)类别的堆叠条形图.问题在于，熊猫最多只能提供7种不同类别的颜色.它将剩余的颜色设置为蓝色.如何确保每个类别都有唯一的颜色?

I need to create a stacked bar chart with a large number (10 or so) categories. The problem is that Pandas only provides colors for up to 7 different categories. It sets the remaining colors as blue. How to I ensure that every category has a unique color?

示例:

df = pd.DataFrame(np.abs(np.random.randn(10,10)),columns=['A','B','C','D','E','F','G','H','I','J'], index=range(10))
df.plot(kind='bar',stacked=True,figsize=(20,10))

生成一个条形图，其中H，I和J没有被赋予唯一的颜色.

Produces a bar chart where H,I, and J are not given unique colors.

推荐答案

In [22]: colors = plt.cm.GnBu(np.linspace(0, 1, 10))

In [23]: df.plot(kind='bar', stacked=True, figsize=(20, 10), color=colors)
Out[23]: <matplotlib.axes._subplots.AxesSubplot at 0x10b792d90>

matplotlib有很多不同的颜色图可供选择.只是不要使用jet.

matplotlib has a bunch of different colormaps to choose from. Just don't use jet.

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