Replace some elements in a Matrices with brief code.

The variables which can be copy/paste to Matlab.

a = [5 6 7 9 1 2 5 6 3 8 9 0];

A = [1 3 6 2;2 4 1 9; 2 3 5 6];

B = a(A);

From the variables above,

Matrix B is [5 7 2 6; 6 9 5 3; 6 7 1 2]. However, Actually the condition is set to >=6 which are replaced by the element in Matrix A. So, the desired result is:

DesiredResult = [5 3 2 2; 2 4 5 3; 2 3 1 2];

[Guillaume]

Don't use looping/for. But, can use other function such as "find".

Where do these requirements come from? Is this homework?

Actually the condition is set to >=6 which are replaced by the element in Matrix A

Anyway, you've pretty much written the one line required with that statement. find is not even necessary.

[Lin Nuo]

it is not a homework.. I just wanna use simple code.

Answer 1

[Stephen23]

>> a = [5,6,7,9,1,2,5,6,3,8,9,0];
>> x = [1,3,6,2;2,4,1,9;2,3,5,6];
>> b = a(x);
>> y = b>=6;
>> b(y) = x(y)
b =
   5   3   2   2
   2   4   5   3
   2   3   1   2

[Lin Nuo]

Okay. This code is perfect. Thankyou so much.