operations in a row only on certain elements
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Hi,
I have a row in a matrix, say A(1,:). I also have a vector b which its elemants are indices, I want to set to zero elements in A(1,:) where its index is NOT included in b. How can I do this?
Example:
A=[1 3 4; 5 6 2; 1 4 2]
b=[ 3 2]
So for the first row of A, I want to have A=[0 3 4; 5 6 2; 1 4 2]
the 2nd and 3rd index are not set to zero.
Thanks in advance.
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