AUC measurment

Discussions
1

I have a time series like the attached and I want to determine the area under the curve per channel over a selected segment (or the whole data block). How would I go about that?

This is time series was derived from the ratio of frequency bands as measured by wavelets. I’ve posted earlier on this.

Thanks.

2

Hello,

There are no tools for computing this in Brainstorm, you have to export the data to Matlab and process it manually.
Right-click on the file > File > Export to Matlab > “s”.
Then compute the integral of the signals: trapz(s.Time, s.F, 2)

Francois

3

Hi Francois,

Thank you for your reply.

Can you please let me know how can I set the integral ‘F’ in trapz(s.Time, s.F, 2) to obtain AUC

4

F is a field of the data matrix that contains the signals:
http://neuroimage.usc.edu/brainstorm/Tutorials/Epoching#On_the_hard_drive