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.


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Determine the NaN elements of the row vector, A.

A = 0./[-2 -1 0 1 2]
A = 1×5

     0     0   NaN     0     0

TF = isnan(A)
TF = 1x5 logical array

   0   0   1   0   0

Extended Capabilities

C/C++ Code Generation
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Introduced before R2006a