How to set all elements of a matrix that meet a certain criteria to NaN?

I have a Matrix A with the size of [200 100 20 60]. How do I set all elements larger than 10^20 as NaN?

Answer 1

[Star Strider]

Try this:

A(A > 1E+20) = NaN;

[Leon]

It works perfectly. Thank you very much!

[Star Strider]

As always, my pleasure!