how can i replce numbers at the end of rows and coloumns in same metrix?

A=zeros(4) and i want to replce numbers at the end of 3rd,4th row and 3rd,4th coloumns. how can i do this?

[Dennie]

 A=zeros(4);
  %replace 3rd row
  A(3,:)=[1 2 3 4];
  %replace 3rd column
  A(:,3)=[1;2;3;4];

Answer 1

[Titus Edelhofer]

Hi,

replacing is a question of indexing. Try

A(3:4, 3:4)

and you should see a 2x2 Matrix. Replace this by any other 2x2 matrix using =

A(3:4,3:4) = rand(2,2);

Titus