[SciPy-user] reading .mat-files (Matlab 7)

Rob Clewley rhc28@cornell....
Wed Jul 25 10:05:28 CDT 2007


Stefan,

scipy.io.loadmat from scipy 0.5.2 doesn't work on anything but v4
files for me. I generated extremely simple mat files (one small matrix
in 'test.mat') with my matlab 7.3 using the -v6, -v5, and -v4 options,
and scipy complained with this in all but the -v4 case:

In [1]: import scipy.io as io

In [2]: io.loadmat('test')
---------------------------------------------------------------------------
exceptions.AttributeError                            Traceback (most
recent call last)

c:\temp\<ipython console>

C:\Python24\lib\site-packages\scipy\io\mio.py in loadmat(file_name, mdict, appen
dmat, basename, **kwargs)
     94     '''
     95     MR = mat_reader_factory(file_name, appendmat, **kwargs)
---> 96     matfile_dict = MR.get_variables()
     97     if mdict is not None:
     98         mdict.update(matfile_dict)

C:\Python24\lib\site-packages\scipy\io\miobase.py in
get_variables(self, variable_names)
    267             variable_names = [variable_names]
    268         self.mat_stream.seek(0)
--> 269         mdict = self.file_header()
    270         mdict['__globals__'] = []
    271         while not self.end_of_stream():

C:\Python24\lib\site-packages\scipy\io\mio5.py in file_header(self)
    508         hdict = {}
    509         hdr = self.read_dtype(self.dtypes['file_header'])
--> 510         hdict['__header__'] = hdr['description'].strip(' \t\n\000')
    511         v_major = hdr['version'] >> 8
    512         v_minor = hdr['version'] & 0xFF

AttributeError: 'numpy.ndarray' object has no attribute 'strip'


This is with numpy 1.0.2. I wonder if this is the problem that Oliver has?

-Rob

On 25/07/07, Stefan van der Walt <stefan@sun.ac.za> wrote:
> Hi Oliver
>
> On Wed, Jul 25, 2007 at 01:06:18PM +0200, oliver.tomic@matforsk.no wrote:
> > Is there now support in scipy.io (scipy 0.52) for reading .mat-files from
> > Matlab 7? I undestand that it supports older versions (v4 and v5). Are
> > there any plans to support for Matlab 7 .mat-files?
>
> >From the docstring:
>
> "v4 (Level 1.0), v6 and v7.1 matfiles are supported."
>
> Cheers
> Stéfan
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> SciPy-user@scipy.org
> http://projects.scipy.org/mailman/listinfo/scipy-user
>


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