tril.h File Reference

Returns the lower triangle of a SparseMatrix. More...

#include <myramath/MYRAMATH_EXPORT.h>
#include <myramath/utility/Number.h>

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Classes
class	myra::SparseMatrix< Number >
	Stores an IxJ matrix A in compressed sparse column format. More...
class	myra::CSparseMatrixRange< Number >
	Represents a const SparseMatrixRange. More...

Functions
Pattern	myra::tril (const PatternRange &P)
	Returns the lower triangle of a Pattern.
SparseMatrix< NumberS >	myra::tril (const CSparseMatrixRange< NumberS > &A)
	Returns the lower triangle of a SparseMatrixRange.
SparseMatrix< NumberD >	myra::tril (const CSparseMatrixRange< NumberD > &A)
	Returns the lower triangle of a SparseMatrixRange.
SparseMatrix< NumberC >	myra::tril (const CSparseMatrixRange< NumberC > &A)
	Returns the lower triangle of a SparseMatrixRange.
SparseMatrix< NumberZ >	myra::tril (const CSparseMatrixRange< NumberZ > &A)
	Returns the lower triangle of a SparseMatrixRange.

Detailed Description

Returns the lower triangle of a SparseMatrix.

Examples:

   [1 2 3]      [1 z z]

tril ( [4 5 6] ) -> [4 5 z] [z 8 9] [z 8 9]

tril ( [1 2 3] ) -> [1 z] [4 z 6] [4 z]

[1 2] [1 z] tril ( [3 z] ) -> [3 z] [5 6] [5 6]

Here z indicates a structural zero. Note tril() crops excess columns.