使用Pandas或Matplotlib在IPython Notebook中绘制性别图表

Question

I have a Pandas dataframe with a Gender column which contains values M or F. I want to chart the count of all M and F as either a bar chart with 2 bars, or a pie chart with 2 wedges.

So far I've tried hist, but it errors out:

data['GENDER'].hist()

TypeError: cannot concatenate 'str' and 'float' objects

Maybe I need to do a groupby?

Answer 1

您可能希望此groupby / size获取每个性别的计数，并使用.plot vs .hist （这仅对数字数据有意义）。

df.groupby('GENDER').size().plot(kind='bar')