How can i read and change the elements of a matrix A with its corresponding new values of elements stored in vector B ?

A1=[1 2 3; 4 4 6; 7 8 9]

A=reshape(A1,[1,9]);

Now i want to replace

1 with11

2 with 22

3 with 33

4 with 44

6 with 66

7 with 77

8 with 88

9 with 99

and the new values are stored in a vector as

B=[ 11 22 33 44 66 77 88 99]

[Stephen23]

Why does 44 only occur once in B even though the value 4 occurs twice in A ?

Why is the order of B as if you reshaped the data rowwise? (note that the data in A is arranged columnwise)

Answer 1

[David Hill]

Hard to know exactly what you want.

a=[1,2,3,4,6,7,8,9];
B=[ 11 22 33 44 66 77 88 99];
for k=1:length(a)
    A(A==a(k))=B(k);
end

Why not just:

A=A*11;