Array elements that are NaN
TF = isnan(A)
TF = isnan(A) returns
an array the same size as A containing logical
1 (true) where the elements of A are NaNs
and logical 0 (false) where they are not. For a
complex number z, isnan(z) returns 1 if
either the real or imaginary part of z is NaN,
and 0 if both the real and imaginary parts are
finite or Inf.
For any real A, exactly one of the three
quantities isfinite(A), isinf(A),
and isnan(A) is equal to one.
A = [-2 -1 0 1 2];
isnan(1./A)
ans =
0 0 0 0 0
isnan(0./A)
ans =
0 0 1 0 0