How to code like this (please read)

Dear all,

sorry for the confusing title, because I lack the experience in MATLAB. so, I need a script that can produce this kind of matrix. e.g. a = { a1 a2 a3; a4 a5 a6; a7 a8 a9} so, a1 = a5 = a9 = 1 >> this will be 'eye(a)' then suppossed a2 = 6, a3 = -4, a6 = 0,5; then a4 = a2, a7 = a3, a8 = a6. any hints for coding this script? thanks in advance.

CS

Answer 1

[Star Strider]

You can do this by using the toeplitz function twice:

A = toeplitz([1 6 -4]);
A(2:3,2:3) = toeplitz([1 0.5]);

produces:

A =

              1            6           -4
              6            1          0.5
             -4          0.5            1