Importing matlab cell array (.mat) into a python list

Question

I'm trying to import a .mat file that contains a cell array. In matlab I did this:

a={'element1';'element2';'element3'};
save('m.mat','-v7','a')

I used '-v7' because, in python, I use 'scipy.io' and 'loadmat' that can be used only with version 7. In python:

import scipy.io as sio
i=sio.loadmat('m.mat')
i.keys()

And I get:

dict_keys(['__header__', '__version__', '__globals__', 'a'])

Finally, I use the key 'a':

k=i['a']

In the variable explorer I get k, that is a object type but I can't access to its elements. How can I convert it to a list?

Thank you

jun.wu · Accepted Answer · 2018-03-15 07:53:14Z

1

I noticed that numpy.savetxt can convert your data to csv with one string column. So, I tried to follow what it does. And I think this is what you want:

val = []
for row in k:
    v = '%s' % tuple(row)
    val.append(v)

If your data is numeric such as float, you can try this:

val = np.asarray(k, dtype='float').tolist()

edited Mar 15, 2018 at 7:53

answered Mar 15, 2018 at 7:22

jun.wu

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