Creating matrix with diag command

I am trying to do this

a = input('enter a number: ')
for i=1:1:a
    for j=1:1:a
        z(i,j)= diag(a)
    end
end
z

I enter 10 to create 10x10 matrix. I am trying to do corner to corner 1-10 like diag command and do other numbers 0. What is my mistake? I must do this with nested for-end.

Answer 1

[Stephan]

This is how a normal Matlab user would so this

z = diag(1:10)

z =
     1     0     0     0     0     0     0     0     0     0
     0     2     0     0     0     0     0     0     0     0
     0     0     3     0     0     0     0     0     0     0
     0     0     0     4     0     0     0     0     0     0
     0     0     0     0     5     0     0     0     0     0
     0     0     0     0     0     6     0     0     0     0
     0     0     0     0     0     0     7     0     0     0
     0     0     0     0     0     0     0     8     0     0
     0     0     0     0     0     0     0     0     9     0
     0     0     0     0     0     0     0     0     0    10

However:

a = input('enter a number: ')

z = zeros(a);

for ii=1:1:a
    for jj=1:1:a
        if ii == jj
            z(ii,jj)= ii;
        end
    end
end

disp(z)

[sky2]

Ok thanks for helping. I will try now.