dlasrt.f File Reference

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

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Function/Subroutine Documentation

subroutine dlasrt	(	character	ID,
		integer	N,
		double precision, dimension( * )	D,
		integer	INFO
	)

DLASRT sorts numbers in increasing or decreasing order.

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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:

[in]	ID	ID is CHARACTER*1 = 'I': sort D in increasing order; = 'D': sort D in decreasing order.
[in]	N	N is INTEGER The length of the array D.
[in,out]	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.
[out]	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.

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