Man page - lasrt(3)

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Manual

lasrt

NAME
SYNOPSIS
Functions
Detailed Description
Function Documentation
subroutine dlasrt (character id, integer n, double precision, dimension( *) d, integer info)
subroutine slasrt (character id, integer n, real, dimension( * ) d, integerinfo)
Author

NAME

lasrt - lasrt: sort vector

SYNOPSIS

Functions

subroutine dlasrt (id, n, d, info)
DLASRT sorts numbers in increasing or decreasing order.
subroutine slasrt (id, n, d, info)
SLASRT sorts numbers in increasing or decreasing order.

Detailed Description

Function Documentation

subroutine dlasrt (character id, integer n, double precision, dimension( *) d, integer info)

DLASRT sorts numbers in increasing or decreasing order.

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.

Parameters

ID is CHARACTER*1
= ’I’: sort D in increasing order;
= ’D’: sort D in decreasing order.

N is INTEGER
The length of the array D.

D is 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

INFO is INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

subroutine slasrt (character id, integer n, real, dimension( * ) d, integerinfo)

SLASRT sorts numbers in increasing or decreasing order.