figure of imshow() is too small
I'm trying to visualize a numpy array using imshow() since it's similar to imagesc() in Matlab.
imshow(random.rand(8, 90), interpolation='nearest')
The resulting figure is very small at the center of the grey window, while most of the space is unoccupied. How can I set the parameters to make the figure larger? I tried figsize=(xx,xx) and it's not what I want. Thanks!
Solution 1:
If you don't give an aspect
argument to imshow
, it will use the value for image.aspect
in your matplotlibrc
. The default for this value in a new matplotlibrc
is equal
.
So imshow
will plot your array with equal aspect ratio.
If you don't need an equal aspect you can set aspect
to auto
imshow(random.rand(8, 90), interpolation='nearest', aspect='auto')
which gives the following figure
If you want an equal aspect ratio you have to adapt your figsize
according to the aspect
fig, ax = subplots(figsize=(18, 2))
ax.imshow(random.rand(8, 90), interpolation='nearest')
tight_layout()
which gives you:
Solution 2:
That's strange, it definitely works for me:
from matplotlib import pyplot as plt
plt.figure(figsize = (20,2))
plt.imshow(random.rand(8, 90), interpolation='nearest')
I am using the "MacOSX" backend, btw.