MATLAB Application Program Interface
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mxIsNaN    Examples   See Also

True if value is NaN (Not-a-Number)

C Syntax

Arguments

The double-precision, floating-point number that you are testing.

Returns

true if value is NaN (Not-a-Number); otherwise, returns false.

Description

Call mxIsNaN to determine whether or not value is equal to NaN. NaN is the IEEE arithmetic representation for Not-a-Number. A NaN is obtained as a result of mathematically undefined operations such as

The system understands a family of bit patterns as being equivalent to NaN. In other words, NaN is not a single value, rather it is a family of numbers that MATLAB (and other IEEE-compliant applications) interpret as being equal to Not-a-Number.

Examples

See mxisfinite.c in the mx subdirectory of the examples directory.

For additional examples, see findnz.c and fulltosparse.c in the refbook subdirectory of the examples directory.

See Also

mxIsFinite, mxIsInf


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