使用定义的列定义Pandas/Matplotlib的条形图颜色 [英] Define bar chart colors for Pandas/Matplotlib with defined column

问题描述

我有一个像这样的数据表表":

I have a dataframe "table" like this:

SAMPLE RANK VALUE CAT 3 N DOG 1 N FISH 4 Y ANT 2 N HORSE 5 N

SAMPLE RANK VALUE CAT 3 N DOG 1 N FISH 4 Y ANT 2 N HORSE 5 N

鉴于VALUE列中有一个"Y"，我该如何为第三个直方图列着色?我希望它看起来像这样:

How can I JUST COLOR the 3rd histogram column, given that there is a "Y" in the VALUE column? I would like it to look like this:

到目前为止，我有:

table.plot('SAMPLE','RANK', hue="VALUE", palette={"Y": "r", "N": '0.75'}, kind='bar')

但这不起作用

推荐答案

您可以通过将VALUE列映射到所需的颜色来实现所需的效果:

You may achieve the desired effect by mapping VALUE column to desired colors:

colors = {'N':'#00BEC5', 'Y':'#F9746A'}
df.sort_values('RANK', inplace=True)
df.plot.bar(x='SAMPLE', y='RANK',color= df['VALUE'].map(colors));

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