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dlasrt.f(3) LAPACK dlasrt.f(3)

NAME

dlasrt.f -

SYNOPSIS

Functions/Subroutines


subroutine dlasrt (ID, N, D, INFO)
DLASRT sorts numbers in increasing or decreasing order.

Function/Subroutine Documentation

subroutine dlasrt (characterID, integerN, double precision, dimension( * )D, integerINFO)

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


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

N


N is INTEGER
The length of the array D.

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.

Date:

September 2012

Definition at line 89 of file dlasrt.f.

Author

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Tue Sep 25 2012 Version 3.4.2