[Mne_analysis] error filtering biosemi imported file

[Mauricio Aspé Sánchez]

Thanks Eric,
do I have to type something like this?

raw = read_raw_edf('bdf_file.bdf', hpts = 'hpts_file.hpts')
raw.filter(30, 1)

in that case, I have to use
raw = read_raw_edf('bdf_file.bdf', hpts = 'hpts_file.hpts', preload =
'True')

Isn't it? But it's strange because when I read the bdf with preload =
'True' I don't know if the program crushes or it will take a lot of time
(I'm loading a 128 channels 50 min EEG on a PC with 8 GB RAM and two 3.4
GHz processors... it takes to EEGLab just 3 min). I waited for 1 hr and the
bdf didn't load.

All the best,
Mauricio.


2014/1/14 Eric Larson <larson.eric.d at gmail.com>

> Hey Mauricio,
>
> You should be able to do "raw.filter(...) " directly on the Raw instance
> (as a method of Raw). Does that make sense?
>
>
> http://martinos.org/mne/stable/generated/mne.fiff.Raw.html#mne.fiff.Raw.filter
>
> Eric
>
>
>
> On Tue, Jan 14, 2014 at 2:12 PM, Mauricio Aspé Sánchez <
> mauricio.aspe.s at gmail.com> wrote:
>
>> Hi everybody,
>> I'm working with some biosemi EEG files
>>
>> the following code:
>>
>> raw = read_raw_edf('bdf_file.bdf', hpts = 'hpts_file.hpts')
>> fraw = filter.band_pass_filter(raw, 1024, 30, 1)
>>
>> gives me the error:
>>
>> Traceback (most recent call last):
>>   File
>> "C:\Users\Mauricio\Documents\Dropbox\PhD\scripts\mne-python\preprocessing.py",
>> line 9, in <module>
>>     fraw = filter.band_pass_filter(raw, 1024, 30, 1)
>>   File "<string>", line 2, in band_pass_filter
>>   File
>> "C:\Python33\lib\site-packages\mne-0.8.git-py3.3.egg\mne\utils.py", line
>> 387, in verbose
>>     ret = function(*args, **kwargs)
>>   File
>> "C:\Python33\lib\site-packages\mne-0.8.git-py3.3.egg\mne\filter.py", line
>> 624, in band_pass_filter
>>     xf = _filter(x, Fs, freq, gain, filter_length, picks, n_jobs, copy)
>>   File
>> "C:\Python33\lib\site-packages\mne-0.8.git-py3.3.egg\mne\filter.py", line
>> 276, in _filter
>>     x, orig_shape, picks = _prep_for_filtering(x, copy, picks)
>>   File
>> "C:\Python33\lib\site-packages\mne-0.8.git-py3.3.egg\mne\filter.py", line
>> 226, in _prep_for_filtering
>>     orig_shape = x.shape
>> AttributeError: 'RawEDF' object has no attribute 'shape'
>>
>> Could somebody tell me what I'm doing wrong?
>> What is the right pipeline importing and filtering .bdf files?
>>
>> All the best,
>> Mauricio.
>>
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