FMSOM
PURPOSE: Open Second Matrix File
To open a second matrix file for storing a matrix.
SYNOPSIS
CALL FMSOM (LUA, NAME, LUF)
INPUT PARAMETERS:
- LUA(25) = Integer array.
Matrix file attribute list for the existing file that was
opened by
RSDI, RNDI, CHDI, CSDI, CNDI.
- NAME = Character string.
A 1 to 119 character string that contains a unique
alphanumeric name for the new matrix file.
FMS generates names for the lower
triangular, diagonal, upper triangular and Segment Table
files by appending 'L', 'D', 'U' and 'T' to NAME.
OUTPUT PARAMETERS:
DESCRIPTION:
FMS matrix factoring subroutines are
designed to overlay the matrix factors on the original matrix
to conserve disk space. However, for some applications, it
may be necessary to preserve the input matrix. For these
applications, subroutine FMSOM should be called to create the
files for storing the factored matrix before calling the
FMS factoring subroutine.
Subroutine FMSOM allocates file space and computes the
attribute list LUF. The Segment Table contained on the
matrix file LUA(4) is copied to the matrix file LUF(4). The
matrix data contained on files LUA(1), LUA(2), and LUA(3) is
not copied to the output files. This matrix data is written
during the factoring process.
The file location of LUF is the same as LUA. If LUA is
incore, LUF will also be incore. If LUA is on disk, LUF will
be on disk.
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