NMath User's Guide

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32.1 Exception Types (.NET, C#, CSharp, Visual Basic, VB.NET)

The following exception classes inherit from NMathException.

Table 21 - Exception classes
Exception
Description
InvalidArgumentException
Thrown when an invalid argument is passed to an NMath function.
InvalidBinBdryException
Thrown when a histogram operation results in invalid bin boundaries.
MatrixNotSquareException
Thrown when a matrix operation requiring a square matrix is presented with a non-square one.
MismatchedSizeException
Exception thrown when an operation is performed with operands whose sizes are incompatible with the operation; for example, if you try to add two vectors with different lengths, or take the inner product of matrices A and B when the number of columns of A is not equal to the number of rows of B.
NMathFormatException
Thrown when a method encounters a faulty text representation; for example, if you try to create a vector from a string that has an invalid format.
SingularMatrixException
Thrown when a matrix operation requiring a non-singular matrix is presented with a singular one.

For example, this code attempts to multiply two matrices with different dimensions, and catches a MismatchedSizeException: 

DoubleComplexMatrix A =
   new DoubleComplexMatrix( 3, 3, new DoubleComplex(1,0) );
DoubleComplexMatrix B =
   new DoubleComplexMatrix( 2, 2, new DoubleComplex(1,0) );

DoubleComplexMatrix C;
try
{
   C = A * B;
}
catch( MismatchedSizeException e )
{
   Console.WriteLine( "Oops - " + e.Message );
}

Matrices must have the same dimensions to be combined using the element-wise operators.

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