dlamrg(3S)

NAME
     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

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

         INTEGER        DTRD1, DTRD2, N1, N2

         INTEGER        INDEX( * )

         DOUBLE         PRECISION A( * )

IMPLEMENTATION
     These routines are part of the SCSL Scientific Library and can be loaded
     using either the -lscs or the -lscs_mp option.  The -lscs_mp option
     directs the linker to use the multi-processor version of the library.

     When linking to SCSL with -lscs or -lscs_mp, the default integer size is
     4 bytes (32 bits). Another version of SCSL is available in which integers
     are 8 bytes (64 bits).  This version allows the user access to larger
     memory sizes and helps when porting legacy Cray codes.  It can be loaded
     by using the -lscs_i8 option or the -lscs_i8_mp option. A program may use
     only one of the two versions; 4-byte integer and 8-byte integer library
     calls cannot be mixed.

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

     A      (input) 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) INTEGER
            DTRD2  (input) 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) 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.
SEE ALSO
     INTRO_LAPACK(3S), INTRO_SCSL(3S)

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