DLAMRG(3)      LAPACK routine of NEC Numeric Library Collection      DLAMRG(3)



NAME
       DLAMRG

SYNOPSIS
       SUBROUTINE DLAMRG (N1, N2, A, DTRD1, DTRD2, INDEX)



PURPOSE
            DLAMRG will create a permutation list which will merge the elements
            of A (which is composed of two independently sorted sets) into a
            single set which is sorted in ascending order.




ARGUMENTS
           N1        (input)
                     N1 is INTEGER

           N2        (input)
                     N2 is INTEGER
                    These arguements contain the respective lengths of the two
                    sorted lists to be merged.

           A         (input)
                     A is DOUBLE PRECISION array, dimension (N1+N2)
                    The first N1 elements of A contain a list of numbers which
                    are sorted in either ascending or descending order.  Likewise
                    for the final N2 elements.

           DTRD1     (input)
                     DTRD1 is INTEGER

           DTRD2     (input)
                     DTRD2 is INTEGER
                    These are the strides to be taken through the array A.
                    Allowable strides are 1 and -1.  They indicate whether a
                    subset of A is sorted in ascending (DTRDx = 1) or descending
                    (DTRDx = -1) order.

           INDEX     (output)
                     INDEX is INTEGER array, dimension (N1+N2)
                    On exit this array will contain a permutation such that
                    if B( I ) = A( INDEX( I ) ) for I=1,N1+N2, then B will be
                    sorted in ascending order.



LAPACK routine                  31 October 2017                      DLAMRG(3)