MATLAB: Quick NAN Question HELP!

Question

A = [1 2 3 1 nan];

If I input

AA~=1

It returns

ans =

     0     1     1     0     1

However, If I want to find the replace the un-null elements with 1, returning a matrix like,

ans =

         1      1     1     1      0

I tried A~= nan,

However, it returns

ans =

          1    1    1    1    1

Any suggestions?

Answer 1

use isnan

A = [1 2 3 1 nan];
~(isnan(A))
 ans =
      1     1     1     1     0