DLASRT(3F)DLASRT(3F)NAME
DLASRT - the numbers in D in increasing order (if ID = 'I') or in
decreasing order (if ID = 'D' )
SYNOPSIS
SUBROUTINE DLASRT( ID, N, D, INFO )
CHARACTER ID
INTEGER INFO, N
DOUBLE PRECISION D( * )
PURPOSE
Sort 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/output) DOUBLE PRECISION array, dimension (N)
On entry, the array to be sorted. On exit, D has been sorted
into increasing order (D(1) <= ... <= D(N) ) or into decreasing
order (D(1) >= ... >= D(N) ), depending on ID.
INFO (output) INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
Page 1
