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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.


collapse all

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
Generate C and C++ code using MATLAB® Coder™.

See Also

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Introduced before R2006a

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