figure of imshow is too small

Question

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

User · Answer

I m new to python too  Here is something that looks like will do what you want to  axes  0 08  0 08  0 94-0 08  0 94-0 08     left  bottom  width  height  axis  scaled      I believe this decides the size of the canvas

User · Answer

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

User · Answer

Update 2020  as requested by  baxxx  here is an update because random rand is deprecated meanwhile   This works with matplotlip 3 2 1   from matplotlib import pyplot as plt import random import numpy as np  random   np random random   8 90    plt figure figsize    20 2   plt imshow random  interpolation  nearest     This plots     To change the random number  you can experiment with np random normal 0 1  8 90    here mean   0  standard deviation   1

User · Answer

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

[python] figure of imshow() is too small

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