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Hi all,
How to define "n_components" in the following function:
mne.decoding.CSP(n_components=4, reg=None, log=None, cov_est='concat',
transform_into='average_power', norm_trace=False,
cov_method_params=None, rank=None)
Is it dependent on the number of classes i have?
can i have it to be more than 4? for example 25?
Is is dependent on the number of electrodes (channels) i have?
many thanks in advance for your help
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Hi,
I would say neither. You can think of CSP a bit like PCA where instead of
maximizing the variance, you are trying to maximize the variance of the
difference between the two classes. Just as in PCA you need to select the
number of components for explaining your variance. But here you also have a
prediction task involved. Thus, if you capture two much of the difference
(too many components), you will overfit and if it's too few, you will
underfit. That's why we recommend setting this parameter by
cross-validation.
Hope that helps.
Best,
Mainak
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Dear all,
I would like to convert a bunch of FIF files (EpochsFIF) to the MNE-BIDS
format. I found the example:
https://mne-tools.github.io/mne-bids/index.html that is relative to the
conversion from a Raw format. Apparently one cannot directly convert a
EpochsFIF to a Raw data file.
So I am wondering if it is possible to convert the EpochsFIF to Raw to
proceed with the conversion to MNE-BIDS format.
Best regards
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External Email - Use Caution
I apologize for a mistake in my previous ... "Apparently one cannot
directly convert a EpochsFIF to a Raw data file. the BIDS format."
Best
External Email - Use Caution
How did you get the EpochsFIF file? Note that the BIDS format is only for
the raw data at the moment and it's not really meant for processed data.
Mainak
External Email - Use Caution
I apologize for a mistake in my previous ... "Apparently one cannot
directly convert a EpochsFIF to a Raw data file. the BIDS format."
BestDear all,
I would like to convert a bunch of FIF files (EpochsFIF) to the MNE-BIDS
format. I found the example:
Page Redirection that is relative to the
conversion from a Raw format. Apparently one cannot directly convert a
EpochsFIF to a Raw data file.
So I am wondering if it is possible to convert the EpochsFIF to Raw to
proceed with the conversion to MNE-BIDS format.
Best regards--
Department of Biomedical and Clinical Sciences "Luigi Sacco"
University of Milan
Phone: +39 02 503 19731
via G. B. Grassi 74 - 20157 Milano
<Google Maps;[image: MailScanner Signature Unimi]
Il tuo 5 x mille progetti
Sostieni la ricerca, investi sul futuro dei giovaniUniversita` degli Studi di Milano - codice fiscale 80012650158
_______________________________________________
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External Email - Use Caution
Thank you very much Mainak
Mainak Jas <mainakjas at gmail.com>, 23 Tem 2019 Sal, 18:18 tarihinde ?unu yazd?:
External Email - Use Caution
Hi Mainak,
thank you for your prompt reply. Indeed, the EpochsFIF file comes from
processed TMS/EEG data (Channels x Time x Trials). Thus, from what you are
saying MNE-BIDS doesn't seem to be the way to go. Will look for some
alternatives then.
Thanks anyway
Best
Thierry
External Email - Use Caution
hi,
indeed there is a BIDS standard only for raw data at this stage. It's not
specific to mne-bids package.
Alex
External Email - Use Caution
Hi Mainak,
thank you for your prompt reply. Indeed, the EpochsFIF file comes from
processed TMS/EEG data (Channels x Time x Trials). Thus, from what you are
saying MNE-BIDS doesn't seem to be the way to go. Will look for some
alternatives then.
Thanks anyway
Best
ThierryExternal Email - Use Caution
How did you get the EpochsFIF file? Note that the BIDS format is only for
the raw data at the moment and it's not really meant for processed data.Mainak
External Email - Use Caution
I apologize for a mistake in my previous ... "Apparently one cannot
directly convert a EpochsFIF to a Raw data file. the BIDS format."
BestDear all,
I would like to convert a bunch of FIF files (EpochsFIF) to the
MNE-BIDS format. I found the example:
Page Redirection that is relative to
the conversion from a Raw format. Apparently one cannot directly convert a
EpochsFIF to a Raw data file.
So I am wondering if it is possible to convert the EpochsFIF to Raw to
proceed with the conversion to MNE-BIDS format.
Best regards--
Department of Biomedical and Clinical Sciences "Luigi Sacco"
University of Milan
Phone: +39 02 503 19731
via G. B. Grassi 74 - 20157 Milano
<Google Maps;[image: MailScanner Signature Unimi]
Il tuo 5 x mille progetti
Sostieni la ricerca, investi sul futuro dei giovaniUniversita` degli Studi di Milano - codice fiscale 80012650158
_______________________________________________
Mne_analysis mailing list
Mne_analysis at nmr.mgh.harvard.edu
Mne_analysis Info Page_______________________________________________
Mne_analysis mailing list
Mne_analysis at nmr.mgh.harvard.edu
Mne_analysis Info Page--
Department of Biomedical and Clinical Sciences "Luigi Sacco"
University of Milan
Phone: +39 02 503 19731
via G. B. Grassi 74 - 20157 Milano
<Google Maps;
_______________________________________________
Mne_analysis mailing list
Mne_analysis at nmr.mgh.harvard.edu
Mne_analysis Info Page
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Hi Thierry,
what Mainak and Alex say is true ... however, if you are interested in
using BIDS for epoched data, we strongly encourage you to look into the
discussion on derivatives (including epochs) for electrophysiology data.
See this Google Doc, were active development of that part of BIDS takes
place:
New contributors are always welcome 
Best,
Stefan
???External Email - Use Caution
hi,
indeed there is a BIDS standard only for raw data at this stage. It's not
specific to mne-bids package.Alex
???External Email - Use Caution
Hi Mainak,
thank you for your prompt reply. Indeed, the EpochsFIF file comes
from processed TMS/EEG data (Channels x Time x Trials). Thus, from
what you are saying MNE-BIDS doesn't seem to be the way to go.
Will look for some alternatives then.
Thanks anyway
Best
Thierry???External Email - Use Caution
How did you get the EpochsFIF file? Note that the BIDS format
is only for the raw data at the moment and it's not really
meant for processed data.Mainak
???External Email - Use Caution
I apologize for a mistake in my previous ... "Apparently
one cannot directly convert a EpochsFIF to a Raw data
file. ?the BIDS format."
BestDear all,
I would like to convert a bunch of FIF files
(EpochsFIF) to the MNE-BIDS format. I found the
example:
Page Redirection
is relative to the conversion from a Raw format.
Apparently one cannot directly convert a EpochsFIF to
a Raw data file.
So I am wondering if it is possible to convert the
EpochsFIF to Raw to proceed with the conversion to
MNE-BIDS format.
Best regards--
Department of Biomedical and Clinical Sciences "Luigi Sacco"
University of Milan
Phone: +39 02 503 19731
via G. B. Grassi 74 - 20157 Milano
<Google Maps;MailScanner Signature Unimi
Il tuo 5 x mille progetti
Sostieni la ricerca, investi sul futuro dei giovaniUniversita` degli Studi di Milano - codice fiscale 80012650158
_______________________________________________
Mne_analysis mailing list
Mne_analysis at nmr.mgh.harvard.edu
<mailto:Mne_analysis at nmr.mgh.harvard.edu>
Mne_analysis Info Page_______________________________________________
Mne_analysis mailing list
Mne_analysis at nmr.mgh.harvard.edu
<mailto:Mne_analysis at nmr.mgh.harvard.edu>
Mne_analysis Info Page--
Department of Biomedical and Clinical Sciences "Luigi Sacco"
University of Milan
Phone: +39 02 503 19731
via G. B. Grassi 74 - 20157 Milano
<Google Maps;
_______________________________________________
Mne_analysis mailing list
Mne_analysis at nmr.mgh.harvard.edu
<mailto:Mne_analysis at nmr.mgh.harvard.edu>
Mne_analysis Info Page_______________________________________________
Mne_analysis mailing list
Mne_analysis at nmr.mgh.harvard.edu
Mne_analysis Info Page
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