HasNan

Return the number of NaN values in a matrix/vector.

ulong vector::HasNan();

ulong matrix::HasNan();

Return Value

The number of matrix/vector elements that contain a NaN value.

Note

When comparing the appropriate pair of elements having NaN values, the Compare and CompareByDigits methods consider these elements equal, while in case of a usual comparison of floating-point numbers NaN != NaN.

Example:

void OnStart(void)
  {
   double x=sqrt(-1);

   Print("single: ",x==x);

   vector<double> v1={x};
   vector<double> v2={x};

   Print("vector: ", v1.Compare(v2,0)==0);
  }

/* Result:

 single: false
 vector: true
*/

See also

MathClassify, Compare, CompareByDigits