Replacing all even numbers in my matrix with their square root value

So I put in the code :

A=[1 4 9; 8 16 7; 3 36 4]
X=sqrt(A(rem(A,2)==0))

It did square root each even number but it put it in it's own matrix but I was trying to replace the even number with new values while still having all the other values in the matric still. How do I fix this?

Answer 1

[Mohammad Sami]

You need to assign it back to A to replace the even values.

A=[1 4 9; 8 16 7; 3 36 4];
i = rem(A,2)==0;
A(i) =sqrt(A(i))

Answer 2

[KSSV]

A=[1 4 9; 8 16 7; 3 36 4]
idx = mod(A,2) ;  
A(idx==0) = sqrt(A(idx==0))