[Mne_analysis] derived channel in python

[Le Wang]

Hi, Denis,

Thanks a lot for the confirmation. I will try the PR and hopefully it'll
solve my problem.

Le

On Fri, Dec 12, 2014 at 6:29 PM, Denis-Alexander Engemann <
denis.engemann at gmail.com> wrote:
>
> Hi,
>
> 2014-12-13 0:22 GMT+01:00 Le Wang <lwang at bu.edu>:
>>
>> Thanks for the reply, Alex!
>>
>> The post in your link seems to be talking about re-referencing, which is
>> also a nice feature to include.
>>
>
> Maybe some terminological problem
>
>
>> But what I was thinking about was to take the difference between a pair
>> of channels (to get the saccade signal, for example)  and do some further
>> processing (ie., saccade detection) with the derived signal. I guess I can
>> always do that using a separate numpy array, but it seems more elegant to
>> be able to save the derived signal in the raw object as a derived channel.
>>
>>
> I think this exact use case gave rise to PR #1670
>
> If I'm not mistaken this should allow you to do exactly what you described.
>
> HTH,
> Denis
>
>
>> Is this something a work in progress?
>>
>> Thanks again!
>>
>> Le
>>
>> On Fri, Dec 12, 2014 at 5:05 PM, Alexandre Gramfort <
>> alexandre.gramfort at telecom-paristech.fr> wrote:
>>
>>> hi,
>>>
>>> it's on the way for MNE-Python:
>>>
>>> https://github.com/mne-tools/mne-python/pull/1670
>>>
>>> you can try the PR or just wait a few more days :)
>>>
>>> Alex
>>>
>>>
>>> On Fri, Dec 12, 2014 at 10:32 PM, Le Wang <lwang at bu.edu> wrote:
>>> > Hi, MNEers,
>>> >
>>> > I know I can create derived channels in the compile version using
>>> > mne_make_derivations. I am just wondering if there's a way to make
>>> derived
>>> > channels in MNE python. I searched the mailinglist and didn't find
>>> anything.
>>> >
>>> > Thanks!
>>> >
>>> > Best
>>> > Le
>>> >
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