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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