for loop problem with matrix

Hi all!

I have matrix 'Input' with the size of 1024*10

i wrote a matlab program just for one vector input(:,1). the programm is:

n1=1024
xx=reshape(Input(:,1),4,n1/4);
x_r=[xx(1,1:n1/4);-xx(3,1:n1/4)];
x_i=[xx(2,1:n1/4);-xx(4,1:n1/4)];
x_rr=reshape(x_r,1,n1/2);  
x_ii=reshape(x_i,1,n1/2);

how could i do the same for alle other 9 vectors, possibly without for loop?

Answer 1

[Iain]

You could do it by using the THIRD dimension.

xx = reshape(Input,[4,nl/4,10]);

x_r = [xx(1,:,:);-xx(3,:,:)];

x_l = [xx(2,:,:);-xx(4,:,:)];

x_rr = reshape(x_r,[1,nl/2,10]);

... etc.