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Man Pages


Manual Reference Pages  -  PSLASRT (l)

NAME

PSLASRT - Sort the numbers in D in increasing order and the corresponding vectors in Q

CONTENTS

Synopsis
Purpose
Arguments

SYNOPSIS

SUBROUTINE PSLASRT( ID, N, D, Q, IQ, JQ, DESCQ, WORK, LWORK, IWORK, LIWORK, INFO )
    CHARACTER ID
    INTEGER INFO, IQ, JQ, LIWORK, LWORK, N
    INTEGER DESCQ( * ), IWORK( * )
    REAL D( * ), Q( * ), WORK( * )

PURPOSE

PSLASRT Sort the numbers in D in increasing order and the corresponding vectors in Q.

ARGUMENTS

ID (global input) CHARACTER*1
  = ’I’: sort D in increasing order;
= ’D’: sort D in decreasing order. (NOT IMPLEMENTED YET)
N (global input) INTEGER
  The number of columns to be operated on i.e the number of columns of the distributed submatrix sub( Q ). N >= 0.
D (global input/output) REAL array, dimmension (N)
  On exit, the number in D are sorted in increasing order.
Q (local input) REAL pointer into the local memory
  to an array of dimension (LLD_Q, LOCc(JQ+N-1) ). This array contains the local pieces of the distributed matrix sub( A ) to be copied from.
IQ (global input) INTEGER
  The row index in the global array A indicating the first row of sub( Q ).
JQ (global input) INTEGER
  The column index in the global array A indicating the first column of sub( Q ).
DESCQ (global and local input) INTEGER array of dimension DLEN_.
  The array descriptor for the distributed matrix A.
WORK (local workspace/local output) REAL array,
  dimension (LWORK) LWORK (local or global input) INTEGER The dimension of the array WORK. LWORK = MAX( N, NP * ( NB + NQ )) where NP = NUMROC( N, NB, MYROW, IAROW, NPROW ), NQ = NUMROC( N, NB, MYCOL, DESCQ( CSRC_ ), NPCOL )
IWORK (local workspace/local output) INTEGER array,
  dimension (LIWORK)

LIWORK (local or global input) INTEGER The dimension of the array IWORK. LIWORK = N + 2*NB + 2*NPCOL

INFO (global output) INTEGER
  = 0: successful exit
< 0: If the i-th argument is an array and the j-entry had an illegal value, then INFO = -(i*100+j), if the i-th argument is a scalar and had an illegal value, then INFO = -i.
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ScaLAPACK version 1.7 PSLASRT (l) 13 August 2001

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