how i subtract a vector( 1*n-dim ) from columns of a matrix (n*n-dim) without uses for , end and orders likes these?
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i wish subtract a vector from columns of a matrix while my code is not great. example: a =
1 3
4 2
>> a-[1 2]= 0 1 3 0
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Accepted Answer
Stephen23
on 24 Apr 2015
Edited: Stephen23
on 24 Apr 2015
>> A = [1, 3; 4, 2]
A =
1 3
4 2
>> B = [1, 2]
B =
1 2
>> bsxfun(@minus, A, B)
ans =
0 1
3 0
bsxfun expands any scalar dimensions to make the input variables the same size, then performs the specified operation. It is also much more efficient than using repmat.
More Answers (1)
Joseph Cheng
on 24 Apr 2015
Look at the function repmat() to tile the vector to perform the matrix subtraction.
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