I need to add two subplots to a figure. One subplot needs to be about three times as wide as the second (same height). I accomplished this using GridSpec
and the colspan
argument but I would like to do this using figure
so I can save to PDF. I can adjust the first figure using the figsize
argument in the constructor, but how do I change the size of the second plot?
Advertisement
Answer
- As of
matplotlib 3.6.0
,width_ratios
andheight_ratios
can now be passed directly as keyword arguments toplt.subplots
andsubplot_mosaic
, as per What’s new in Matplotlib 3.6.0 (Sep 15, 2022).
f, (a0, a1) = plt.subplots(1, 2, width_ratios=[3, 1])
f, (a0, a1, a2) = plt.subplots(3, 1, height_ratios=[1, 1, 3])
- Another way is to use the
subplots
function and pass the width ratio withgridspec_kw
- matplotlib Tutorial: Customizing Figure Layouts Using GridSpec and Other Functions
matplotlib.gridspec.GridSpec
has availablegridspect_kw
options
import numpy as np import matplotlib.pyplot as plt # generate some data x = np.arange(0, 10, 0.2) y = np.sin(x) # plot it f, (a0, a1) = plt.subplots(1, 2, gridspec_kw={'width_ratios': [3, 1]}) a0.plot(x, y) a1.plot(y, x) f.tight_layout() f.savefig('grid_figure.pdf')
- Because the question is canonical, here is an example with vertical subplots.
# plot it f, (a0, a1, a2) = plt.subplots(3, 1, gridspec_kw={'height_ratios': [1, 1, 3]}) a0.plot(x, y) a1.plot(x, y) a2.plot(x, y) f.tight_layout()