如何在Python Pandas中显示分组直方图的标题？

Question

Here is an example dataframe:

print(df.head(5))


     Days     State
0    1.2     IN
1    3.4     IN
2   18.8     CA
3   16.5     CA
4    0.2     IL

I have a dataframe that I am grouping to display histograms as such:

  df.groupby('State').hist(bins=10, label='Dept')
  plt.show()

Lets say there are only 3 States: IN, IL, and CA.

This displays the 3 histograms, but the titles are not displaying the states, but rather just say 'Country' for each one. How can I set this up to have the states listed as the titles?

this kinda of accomplishes what I am after:

df.hist(by=df['State'], bins=30)
plt.show()

But I don't like how it puts the histograms on a automatic grid. Is there anyway to just show them separately, on top of each other like it does in the top code?

To rephrase my question, when there are 9 states in the data, the df.hist(by=df['State'], bins=30) will have 9 histograms in a 3x3 grid, 3 histograms wide, 3 tall.

This is an issue because it makes them each too small and labels overlap. I'm not sure how to adjust the layout to make the histograms larger and in a single column with a scroll bar in jupyter for example.

Answer 1

Use layout and figsize :

df.hist(by=df['State'], bins=30, layout=(3,1), figsize=(5,15))

Output: