Figure Properties - SERC

isnan
2isnan
Purpose Detect NaN elements of an array
Syntax TF = isnan(A)
Description TF = isnan(A) returns an array the same size as A containing logical true (1)
where the elements of A are NaNs and logical false (0) 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.
2-1246
For any real A, exactly one of the three quantities isfinite(A), isinf(A), and
isnan(A) is equal to one.
Examples a = [-2 -1 0 1 2]
isnan(1./a)
Warning: Divide by zero.
ans =
0 0 0 0 0
isnan(0./a)
Warning: Divide by zero.
ans =
0 0 1 0 0
See Also isfinite, isinf, is*