[Mne_analysis] Save data to certain format

[dgw]

You can also read the fiff files in using the matlab toolbox

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> On Apr 1, 2016, at 13:26, chanderler mei <semsociaty at gmail.com> wrote:
> 
> Hi Teon, 
> 
> I try to use savemat to save the raw data, but savemat cannot handle 'nonetype' class. I delete all the empty fields from the raw using pop() because I think raw is a dictionary. However, there are still 'nonetype' class in raw. Do you know if there is a way to handle it?
> 
> Thank you very much for your time,
> 
> Ning
> 
>> On Thu, Mar 31, 2016 at 11:10 PM, Teon Brooks <teon.brooks at gmail.com> wrote:
>> Hi Ning,
>> 
>> The only output file from MNE is the *.fif. We read the multiple formats but we have two options for getting the data out: 1. raw.save with the *.fif, or 2. externally from the numpy.ndarray as an npy with `np.save` or as a mat file with `scipy.io.savemat`. The latter seems like the most suitable if you want to interact with EEGLAB in Matlab.
>> 
>> HTH,
>> 
>> 
>> 
>> teon
>> --
>> 
>> 
>> Teon Brooks, PhD Candidate
>> NSF Fellow, Chateaubriand Fellow
>> Department of Psychology, New York University
>> Researcher | OpenBCI
>> Co-Chair | BraiNY, Greater NYC Chapter of Society for Neuroscience
>> 
>>> On Thu, Mar 31, 2016 at 6:13 PM, chanderler mei <semsociaty at gmail.com> wrote:
>>> Dear all,
>>> 
>>> I loaded my eeg data from *.edf format files. After adding a duplicate channel, I want to save the raw data back a *.edf format file: 
>>> 
>>> raw.save('sample_edf.edf',overwrite=True)
>>> 
>>> The file seems to be much bigger than the original one, from 460,000 KB to 860,000 KB. 
>>> 
>>> Also, when I try to import it to Matlab EEGLAB, it says: 
>>> EEGLAB error in function getfiletype() at line 1111:
>>> 
>>> Operands to be || and && operators must be convertible to logical scalar values. 
>>> 
>>> And then I try to open the *.edf file in EDFbrowser, and return error:
>>> 1th character of version field is not a valid 7-bit ASCII character. File is not a valid EDF or BDF file. 
>>> 
>>> I try to just read the *.edf file to python and save it to another *.edf file, same errors occur. 
>>> 
>>> QUESTION:
>>> Is there a format of file I could export my raw data so that it is readable in Matlab EEGLAB? Or is there a way to save the raw data to a readable *.edf file?
>>> 
>>> Thank you very much for your time,
>>> 
>>> Sincerely,
>>> 
>>> Ning
>>> 
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