How to add a value to a row vector x number of times in a loop to get an array of iterations

Hi,

I am trying to add a value to a row vector a set number of times but keep the first iteration and move it to the next row, I've been trying to use a for loop but I cannot get it to work correctly. Here is an example,

%
 A = [-100 -200 -150 -50]
 B = [10 20 15 5]

I want the resulting array C to look like

%
 C = [-100 -200 -150 -50
      -90  -180 -135 -45
      -80  -160 -120 -40]

I've been trying to use the following code

%
for i = 1:4
  for j = 1:3
      C(i,j) = A(i,j) - B(i,j);
  end
end

If anyone has any advice that'd be great.

Answer 1

[Azzi Abdelmalek]

A = [-100 -200 -150 -50]
B = [10 20 15 5]
r=bsxfun(@times,B,(0:2)')
out=bsxfun(@plus,r,A)

[Thomas]

Thank you so much.