On Sat, Apr 7, 2012 at 11:25 AM, Jostein Bø Fløystad <
jostein.floys...@gmail.com> wrote:
> I've had problems saving MxNx3 (RGB) numpy arrays as images using
> imsave. It fails with an exception, and the problem seems to be line
> 1243 in image.py:
>
> figsize = [x / float(dpi) for x in arr.shape[::-1]]
>
> The purpose of arr.shape[::-1] seems to be to reorder the height and
> width dimensions. It works as intended for MxN arrays, but not NxMx3
> arrays -- they cause a function to complain about an argument too
> many.
>
> I have modified the above line to use (arr.shape[1], arr.shape[0])
> instead of arr.shape[::-1], and that solves the problem for me, and I
> get the output I expect (and the code still passes all tests it should
> pass). However, there could very well be subtleties in the codebase
> that I don't know about.
>
> The attached patches add a simple test case, the above mentioned
> change and a few updates to the documentation of imsave.
>
> Best,
>
> Jostein.
>
>
Jostein,
That second patch certain fixes that part of the bug, but I still can't
save an NxMx3 (or 4) array using imsave(). Are you sure this is all of the
patch?
I get the following exception:
```
Traceback (most recent call last):
File "quickshow.py", line 106, in <module>
plt.imsave(stem + '.png', cm(d))
File
"/home/broot/.local/lib/python2.7/site-packages/matplotlib-1.2.x-py2.7-linux-x86_64.egg/matplotlib/pyplot.py",
line 1757, in imsave
return _imsave(*args, **kwargs)
File
"/home/broot/.local/lib/python2.7/site-packages/matplotlib-1.2.x-py2.7-linux-x86_64.egg/matplotlib/image.py",
line 1244, in imsave
fig = Figure(figsize=figsize, dpi=dpi, frameon=False)
File
"/home/broot/.local/lib/python2.7/site-packages/matplotlib-1.2.x-py2.7-linux-x86_64.egg/matplotlib/figure.py",
line 269, in __init__
self.bbox_inches = Bbox.from_bounds(0, 0, *figsize)
TypeError: from_bounds() takes exactly 4 arguments (5 given)
```
Cheers!
Ben Root
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