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Array elements that are finite


TF = isfinite(A)


TF = isfinite(A) returns an array the same size as A containing logical 1 (true) where the elements of the array A are finite and logical 0 (false) where they are infinite or NaN. For a complex number z, isfinite(z) returns 1 if both the real and imaginary parts of z are finite, and 0 if either the real or the imaginary part is infinite or NaN.

For any real A, exactly one of the three quantities isfinite(A), isinf(A), and isnan(A) is equal to one.


collapse all

Create a row vector, A, and determine the finite elements.

A = 1./[-2 -1 0 1 2]
A = 1×5

   -0.5000   -1.0000       Inf    1.0000    0.5000

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

   1   1   0   1   1

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

See Also

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Introduced before R2006a