How to create a binary svm classifier?

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Somaia Ahmadi
Somaia Ahmadi on 18 Jul 2017
Commented: Walter Roberson on 18 Jul 2017
I have 5 sets of data each with 3 runs of eeg signal acquisitions, and I'm to create a classifier that will distinguish between the rest and mental activity in each run. So first ten seconds are mental activity and then rest for 20s. The class labels are given but its just [1 2 1 2 1 2 1 2 1 2 1 2] for class 1 being mental activity and 2 being rest, for all runs and subjects? To use fitcsvm I need the Y labels array but am not sure how to get that

Answers (2)

Walter Roberson
Walter Roberson on 18 Jul 2017
The Y labels vector is the same as the class labels vector.
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Somaia Ahmadi
Somaia Ahmadi on 18 Jul 2017
Edited: Somaia Ahmadi on 18 Jul 2017
Nope it should still be mental activity or rest, but I'm worried that if I put all the runs from each subjects together in one matrix the class labels won't apply..
Walter Roberson
Walter Roberson on 18 Jul 2017
As long as you keep columns separate you will be fine. (Each column is an individual sample.)

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Image Analyst
Image Analyst on 18 Jul 2017
Did you try the Classification Learner app, on the Apps tab, and have the wizard export the code for you?
  1 Comment
Somaia Ahmadi
Somaia Ahmadi on 18 Jul 2017
Yeah I did, but it wasn't able to find the response variable (which I assume is the class label vectors in the cell array containing the signals)

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