isnan - Array elements that are NaN
Syntax
TF = isnan(A)
Description
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.
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 0See Also
isfinite, isinf, is*
 | ismethod | | isnumeric |  |
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