[SciPy-dev] matlab io - request for testing

[Ariel Rokem]

Hi Matthew,

no  - I have been comparing 0.6.0 and r5579, so everything I am saying
henceforth may turn out to be irrelevant.

At any rate, I attach a .mat file - for this file:

In [24]: sp.__version__
Out[24]: '0.6.0'

In [25]: mat_file = sio.loadmat('RMT110408.mat')

In [26]: mat_file
Out[26]:
{'ROI': <scipy.io.mio5.mat_struct object at 0x1b2ef110>,
 '__globals__': [],
 '__header__': 'MATLAB 5.0 MAT-file, Platform: MAC, Created on: Wed Dec  3
18:45:42 2008',
 '__version__': '1.0'}

In [31]: sp.__version__
Out[31]: '0.8.0.dev5579'

In [32]: mat_file = sio.loadmat('RMT110408.mat')

In [33]: mat_file
Out[33]:
{'ROI': array([[<scipy.io.matlab.mio5.mat_struct object at 0x1d277810>]],
dtype=object),
 '__globals__': [],
 '__header__': 'MATLAB 5.0 MAT-file, Platform: MAC, Created on: Wed Dec  3
18:45:42 2008',
 '__version__': '1.0'}


>From all that you have said, this is probably no surprise to you.

Cheers,

Ariel


On Fri, Feb 20, 2009 at 9:05 AM, Matthew Brett <matthew.brett at gmail.com>wrote:

> Hi Ariel,
>
> Here's a wave up the hill.
>
> >     mat_file = sio.loadmat('file_name.mat')
> >     variable_values = mat_file['field_name'].variable
> >
> > Has to now be written:
> >
> >     mat_file = sio.loadmat('file_name.mat')
> >     field_values = mat_file['field_name'][0][0].variable[0][0]
>
> That's surprising.  For a long time now, the reader has always
> returned at least 2D arrays from matlab, so the latter is what I was
> expecting.
>
> Are you sure this is a difference between 0.7 and current SVN?  Can
> you check and then send me an example mat file with different behavior
> for the two versions?
>
> See you,
>
> Matthew
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