Replace values in matrix with other values

Question

I have a matrix with integers and I need to replace all appearances of 2 with -5. What is the most efficient way to do it? I made it the way below, but I am sure there is mo

Answer 1

find is not needed in this case. Use logical indexing instead:

a(a == 2) = -5

In case of searching whether a matrix is equal to inf you should use

a(isinf(a)) = -5

The general case is:

Mat(boolMask) = val

where Mat is your matrix, boolMask is another matrix of logical values, and val is the assignment value