lasrt - Man Page

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.

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.

Definition at line 87 of file dlasrt.f.

SLASRT 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 REAL 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.

Definition at line 87 of file slasrt.f.