How can I create following matrix using code

How can I create following matrix using code (as I have to create a large matrix of similar nature):

A_1= [1 1 1; 0 0 0; 0 0 0]
A_2= [0 0 0; 1 1 1; 0 0 0]
A_3=[0 0 0; 0 0 0; 1 1 1]

For A_1 the first row is 1 and rest are zero. For A_2 second row is 1 and other are 0. For A_3 third row is 1 and rest 0.

[Walter Roberson]

That looks like a series of matrices rather than a single matrix.

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

Answer 1

[Youssef Khmou]

try :

 N=3;
 A1=[ones(1,N);zeros(2,N)];
 A2=[zeros(1,N);ones(1,N);zeros(1,N)];
 A3=[zeros(2,N);ones(1,N)];