External Interfaces Reference

mxGetNaN

Get value of NaN (Not-a-Number)

C Syntax

• #include "matrix.h"
  double mxGetNaN(void);
  

Returns

The value of NaN (Not-a-Number) on your system.

Description

Call mxGetNaN to return the value of NaN for your system. NaN is the IEEE arithmetic representation for Not-a-Number. Certain mathematical operations return NaN as a result, for example,

• 0.0/0.0
• Inf-Inf

The value of Not-a-Number is built in to the system. You cannot modify it.

Examples

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

See Also

mxGetEps, mxGetInf

mxGetName (Obsolete)

mxGetNumberOfDimensions

© 1994-2005 The MathWorks, Inc.