Truncating y axis in matplotlib

Question

The y axis of my matplotlib bar chart is between 0 and 1. However, all values for in the chart are between 0.8 and 1 so I would like to start the y axis at 0.7. I haven't been able to find the pandas method of doing this so any help would be appreciated.

Thanks in advance

If using `DataFrame.plot()` method, add argument `ylim=(0.7, 1)` — Chris Adams, Mar 19 '19 at 15:26
yep that worked perfectly thanks. I did not know lim existed — toothsie, Mar 19 '19 at 15:28

score 2 · Answer 1 · answered Mar 19 '19 at 15:25

New Answer

@ChrisA has provided the best answer in the comments: If using DataFrame.plot() method, add argument ylim=(0.7, 1)

Old Answer

If you've used the usual import matplotlib.pyplot as plt, a quick fix could be to add the following lines under your pandas plot command:

# gca = "get current axis"
ax = plt.gca()

# ax.get_ylim() returns a tuple of (lower ylim, upper ylim)
ax.set_ylim(0.7, ax.get_ylim()[1])

If you're using the object-oriented matplotlib API that typically starts with something like fig, ax = plt.subplots() (reference: The Lifecycle of a Plot), then you won't need to run ax = plt.gca().

Truncating y axis in matplotlib

1 Answers1

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Old Answer