qreordering: Compute the reordering using the GMRFLib implementation

Description Usage Arguments Value Author(s) Examples

Description

This function compute the reordering (or find the best reordering) using the GMRFLib implementation

Usage

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     inla.qreordering(graph, reordering)
 

Arguments

graph

A (inla-)graph object, a filename containing the graph or a matrix/Matrix defining it.

reordering

The type of reordering algorithm to be used; either one of the names listed in inla.reorderings(). The default is "auto" which try several reordering algorithm and use the best one for this particular matrix.

Value

inla.qreordering returns a list with the name of the reordering algorithm used or found, the reordering code for the reordering algorithm, the actual reordering and its inverse.

Author(s)

Havard Rue hrue@math.ntnu.no

Examples

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 g = system.file("demodata/germany.graph", package="INLA")
 r = inla.qreordering(g)
 m = inla.graph2matrix(g)
 r = inla.qreordering(m)
 m.file = INLA:::inla.write.fmesher.file(m)
 r = inla.qreordering(m.file)
 unlink(m.file)

andrewzm/INLA documentation built on May 10, 2019, 11:12 a.m.