Hi all,
I have eeg data for hand movement recorded from 32 electrodes. I did the
classification and got an accuracy. I removed the electrodes on the sides.
And did the classification for only 16 electrodes (over the motor cortex).
I got lower accuracy. (I think this is due to the high connectivity).
Then I wanted to see how the classification would be for the rest
electrodes. So I dropped (removed) the electrodes over the motor cortex and
chose only the electrodes on the sides. Surprisingly I got better results
by choosing the electrodes on the sides than the case when choosing the
electrodes over the motor cortex?
Is it normal? I'm new to this. I think you have more experience and
knowledge than me.
how many trials/samples do you have? What is the variance of the accuracy
over folds? I am asking to know if your conclusions of "better" are strong
or could be due to variance/randomness in the estimation.
Thank you very much for the answer. I have 35 samples from first class vs
65 samples from second class. I'm using the TSClassifier with the
covariance matrices. The variance in the accuracy was about 4%.
Thanks for your help and for your suggestions
Alexandre Gramfort <alexandre.gramfort at inria.fr>, 30 Nis 2019 Sal, 09:57
tarihinde ?unu yazd?:
External Email - Use Caution
hi,
how many trials/samples do you have? What is the variance of the accuracy
over folds? I am asking to know if your conclusions of "better" are strong
or could be due to variance/randomness in the estimation.
Alex
>
> External Email - Use Caution
>
> Hi all,
> I have eeg data for hand movement recorded from 32 electrodes. I did the
classification and got an accuracy. I removed the electrodes on the sides.
And did the classification for only 16 electrodes (over the motor cortex).
I got lower accuracy. (I think this is due to the high connectivity).
> Then I wanted to see how the classification would be for the rest
electrodes. So I dropped (removed) the electrodes over the motor cortex and
chose only the electrodes on the sides. Surprisingly I got better results
by choosing the electrodes on the sides than the case when choosing the
electrodes over the motor cortex?
> Is it normal? I'm new to this. I think you have more experience and
knowledge than me.
>
> Thanks in advance for any help
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