petsc-3.6.1 2015-08-06

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PetscDTGaussQuadrature

create Gauss quadrature

Synopsis

#include "petscdt.h" 
PetscErrorCode PetscDTGaussQuadrature(PetscInt npoints,PetscReal a,PetscReal b,PetscReal *x,PetscReal *w)

Not Collective

Input Arguments

	npoints	- number of points
	a	- left end of interval (often-1)
	b	- right end of interval (often +1)

Output Arguments

	x	- quadrature points
	w	- quadrature weights

References

Golub and Welsch, Calculation of Quadrature Rules, Math. Comp. 23(106), 221--230, 1969.

See Also

PetscDTLegendreEval()

Level:intermediate
Location:src/dm/dt/interface/dt.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages