SVIGN

Sorts an integer array by algebraically increasing value.

Required Arguments

IA — Integer vector of length N containing the array to be sorted. (Input)

IB — Integer vector of length N containing the sorted array. (Output)
If IA is not needed, IA and IB can share the same storage locations.

Optional Arguments

N — Number of elements in the array to be sorted. (Input)
Default: N = size (IA,1).

FORTRAN 90 Interface

Generic: CALL SVIGN (IA, IB [, …])

Specific: The specific interface name is S_SVIGN .

FORTRAN 77 Interface

Single: CALL SVIGN (N, IA, IB)

Description

Routine SVIGN sorts the elements of an integer array, A, into ascending order by algebraic value. The routine SVIGN uses the algorithm discussed in SVRGN. On completion, Aj ≤ Ai for j < i.

Example

This example sorts the 10‑element array IA algebraically.

 

USE SVIGN_INT

USE UMACH_INT

 

IMPLICIT NONE

! Declare variables

INTEGER N, J, NOUT

PARAMETER (N=10)

INTEGER IA(N), IB(N)

! Set values for IA

! IA = ( -1 2 -3 4 -5 6 -7 8 -9 10 )

!

DATA IA/-1, 2, -3, 4, -5, 6, -7, 8, -9, 10/

! Sort IA by algebraic value into IB

CALL SVIGN (IA, IB)

! Print results

CALL UMACH (2,NOUT)

WRITE (NOUT, 99999) (IB(J),J=1,N)

!

99999 FORMAT (' The output vector is:', /, 10(1X,I5))

END

Output

 

The Output vector is:

-9 -7 -5 -3 -1 2 4 6 8 10