Use the values in one matrix as index values to another matrix and replace with a value

Hello,

I have a matrix A of size 24 x 365 with certain values and I have a matrix B of zeros of the same size as A. I would like to replace the zeros in B with the value 5 in the position mentioned in A.

For example

I would like B to look like

I would appreciate any help thank you!

Answer 1

[David Hill]

The sizes of A and B in your example are not the same.

m=max(A,[],'all');
B=zeros(m,size(A,2));
a=A+(0:m:m*(size(A,2)-1));
B(a)=5;

[Ritika Srinivasan]

Thankyou for the answer that is just a snippet as i didnt want to show two 24x365 sized matrices. would the logic remain the same?