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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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