pandas 带 groupby 的条形图
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Bar plot with groupby
提问by jacob
My categorical variable case_satustakes on four unique values. I have data from 2014 to 2016. I would like to plot the distribution of case_statusgrouped by year. I try to this using:
我的分类变量case_satus具有四个唯一值。我有 2014 年到 2016 年的数据。我想绘制case_status按年份分组的分布。我尝试使用：
df.groupby('year').case_status.value_counts().plot.barh()
And I get the following plot:
我得到以下情节：
What I would like to have is a nicer represenation. For example where I have one color for each year, and all the "DENIED" would stand next to each other.
我想要的是一个更好的代表。例如，我每年有一种颜色，所有“拒绝”都会彼此相邻。
I think it can be achieved since the groupby object is a multi-index, but I don't understand it well enough to create the plot I want.
我认为它可以实现，因为 groupby 对象是一个多索引，但我对它的理解不够好，无法创建我想要的图。
The solution is:
解决办法是：
df.groupby('year').case_status.value_counts().unstack(0).plot.barh()
and results in
并导致
