I do not think fig.add_axes([0.1, 1, 1, 1]) makes any sense. The docstring says:

fig.add_axes(*args, **kwargs)

Add an axes at position *rect* [*left*, *bottom*, *width*,
*height*] where all quantities are in fractions of figure
width and height.

If bottom and height are both 1 you need the height of the figure to
be 2 in fractions of figure height. This means 1 must equal 2 and then
Bertrand Russel must be the Pope[1].

Goyo

[1] 
http://ceadserv1.nku.edu/longa//classes/mat385_resources/docs/russellpope.html

2015-05-20 13:43 GMT+02:00 aradand <arada...@gmail.com>:
> I'm trying to plot an image on top of a Figure, but imshow seems to always
> distort the size of the axes. What I want is that the lower part of the top
> image stay always in the same position, for any image height
>
> This minimal example shows my issue
>
> import matplotlib.pyplot as plt
> import numpy as np
>
> fig = plt.figure()
> ax = fig.add_axes([0.1, 0, 1, 1])
>
> # Top figure aligned with the bottom figure
> # keeping the same width (?)
> ax2 = fig.add_axes([0.1, 1, 1, 1])
> ax2.set_xticks([])
>
> # Depending on the number of rows or columns
> # the top image will be moved further to the top
> # or will be stretched if rows > columns
> # I dont know how to control this to stay always
> # with the same separation with respect
> # to the bottom figure and keeping the same width
> # (so the frame is the same width than the bottom figure)
> im = np.random.rand(10, 30)
> ax2.imshow(im)
> plt.plot()
>
> If it is possible to
>
> I would prefer to avoid using subplots or grid, since I have already
> specified a lot of things using the add_axes method.
>
>
>
> --
> View this message in context: 
> http://matplotlib.1069221.n5.nabble.com/Fixing-axes-for-imshow-plot-on-top-of-a-figure-tp45579.html
> Sent from the matplotlib - users mailing list archive at Nabble.com.
>
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