how to multiply a matrix with scalar ?

Question

kitty varghese 2017-9-14

编辑： per isakson 2017-9-14

I have 49 matrix which i call them as atom. I want to multiply each atom with a 49 different scalar value. ie atom1*h1+atom2*h2 .......atom49*h49.

A = rand(361,49);
B = reshape(A,19,19,1,49);
H = radn(49,1);

Stephen23 2017-9-14

Why not simply specify the final dimensions you require right from the start, rather than wasting time with reshape? This:

A = rand(361,49);
B = reshape(A,19,19,1,49);

should simply be:

B = rand(19,19,1,49);

Answer 1

KSSV 2017-9-14

A = rand(361,49);
B = reshape(A,19,19,1,49);
H=rand(49,1);
A = zeros(19,19) ;
for i = 1:49
    A = A+H(i)*B(:,:,1,i) ;
end