SVIBN

Sorts an integer array by nondecreasing absolute 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 SVIBN (IA, IB [, …])

Specific: The specific interface name is S_SVIBN.

FORTRAN 77 Interface

Single: CALL SVIBN (N, IA, IB)

Description

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

Example

This example sorts the 10-element array IA by absolute value.

 

USE SVIBN_INT

USE UMACH_INT

 

IMPLICIT NONE

! Declare variables

INTEGER I, J, NOUT, N

 

 

! Set values for IA

! IA = ( -1 3 -4 2 -1 0 -7 6 10 -7)

!

DATA IA/-1, 3, -4, 2, -1, 0, -7, 6, 10, -7/

! Sort IA by absolute value into IB

CALL SVIBN (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:

0 -1 -1 2 3 -4 6 -7 -7 10