MATLAB: Subtracting Vector from a Matrix

MATLABmatrixsubtractingvector

I have the matrix a (8×1001) and b (1×1001) as in attached.

a and b can change in size.

How do I substract b from each row of a and put in a new matrix c?

Thanks.

Matlab can subtract vectors from matrices automatically since R2016b - so called "auto expanding". Do you use an older version? Then:

c = bsxfun(@minus, a, b)

a=rand(4,3)
b=rand(1,6)
[n,m]=size(a)
p=numel(b);
c=reshape(bsxfun(@times, repmat(a(:)',numel(b),1),b')',n,m,p)

repmat can be used to create a matrix bExp of the same size as A where the rows are repeated.

bExp = repmat(b,size(A,1),1); % Expand b to be the size of A (assuming width are same)
C = A.^bExp;