edu.emory.mathcs.csparsej.tdouble

Class Dcs_counts

java.lang.Object

edu.emory.mathcs.csparsej.tdouble.Dcs_counts

public class Dcs_counts
extends java.lang.Object

Column counts for Cholesky and QR.

Constructor Summary

Constructors

Constructor and Description
Dcs_counts()

Method Summary

Modifier and Type	Method and Description
static int[]	cs_counts(Dcs_common.Dcs A, int[] parent, int[] post, boolean ata) Column counts of LL'=A or LL'=A'A, given parent & postordering

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Dcs_counts

public Dcs_counts()

Method Detail

cs_counts

public static int[] cs_counts(Dcs_common.Dcs A,
                              int[] parent,
                              int[] post,
                              boolean ata)

Column counts of LL'=A or LL'=A'A, given parent & postordering

Parameters:

A - column-compressed matrix

parent - elimination tree of A

post - postordering of parent

ata - analyze A if false, A'A otherwise

Returns:

column counts of LL'=A or LL'=A'A, null on error