DLAPST(l) ) DLAPST(l)NAME
DLAPST - Define a permutation INDX that sorts the numbers in D in
increasing order (if ID = 'I') or in decreasing order (if ID = 'D' )
SYNOPSIS
SUBROUTINE DLAPST( ID, N, D, INDX, INFO )
CHARACTER ID
INTEGER INFO, N
INTEGER INDX( * )
DOUBLE PRECISION D( * )
PURPOSE
Define a permutation INDX that sorts the numbers in D in increasing
order (if ID = 'I') or in decreasing order (if ID = 'D' ). Use Quick
Sort, reverting to Insertion sort on arrays of
size <= 20. Dimension of STACK limits N to about 2**32.
ARGUMENTS
ID (input) CHARACTER*1
= 'I': sort D in increasing order;
= 'D': sort D in decreasing order.
N (input) INTEGER
The length of the array D.
D (input) DOUBLE PRECISION array, dimension (N)
The array to be sorted.
INDX (ouput) INTEGER array, dimension (N).
The permutation which sorts the array D.
INFO (output) INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
ScaLAPACK version 1.7 13 August 2001 DLAPST(l)
