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How to get a matrix row conditionally?

In Matlab, I have a variable X containing training data (rollise). In addition, there is a variable S with a data class. How do I get all X records with a special (e.g. negative) class?

Example:

X = [1 2;3 4;5 6;7 8;9 10];
S = [1 -1 -1 1 -1];

Should give:

ans = [3 4;5 6;9 10];
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1 answer


You just need to do:

X(S<0,:)


This array will contain strings X

for which is S

negative.

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