creating a large matrix with a pattern

Hi,

I would like to create a 800x200 matrix which looks like:

     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     0     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     0     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     0     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     0     0     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0

To put in in words, every new column should start with the column [1 1 0 1].' when the other is finished.

Tried to do this with toeplitz. However this results in only 1 step change of columns e.g.

     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     1     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     0     1     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     1     0     1     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     0     1     0     1     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     0     0     1     0     1     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0
     0     0     0     1     0     1     1     0     0     0     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     1     0     1     1     0     0     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     1     0     1     1     0     0     0     0     0     0     0     0     0     0     0

This is not what I desire. Does anyone know another way to do this?

Answer 1

[convert_to_metric]

Hi bus14,

Try this:

m=zeros(804,200);
m([1,2,4],:)=1;

m2=reshape(m,800,[]);
m2(:,201)=[];

Answer 2

[Andrei Bobrov]

out = kron(eye(200),[1;1;0;1]);

or

a = [1;1;0;1;zeros(796,1)];
out = a(mod((1:800)'-(1:4:800),800)+1);