使用 pandas.DataFrame.plot() 时如何显示所有 xticks？

Question

I'm struggling to get all the ticks in the horizontal axis when plotting a pandas dataframe. This is my MWE:

import pandas as pd

letters = 'ABCDEFGHIJKL'
data = [{'Letter': letter, 'Number': number} 
        for number, letter in enumerate(letters)]

df = pd.DataFrame(data)
df.set_index('Letter', inplace=True)

The dataframe looks like this:

In [484]: df
Out[484]: 
        Number
Letter        
A            0
B            1
C            2
D            3
E            4
F            5
G            6
H            7
I            8
J            9
K           10
L           11

When I plot the dataframe only half of the xticks are displayed:

df.plot(kind='line', use_index=True)

How can I get all the xticks (from A through L )?

Answer 1

In order to force ticks you need to explicitly set xticks and xtickslabels

ax = df.plot(kind='line', use_index=True)
ax.set_xticks(range(len(df.index)))
ax.set_xticklabels(df.index)