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3.5 Changing the type of a D.S. MUA

Module CSAMAT changes the type of a D.S. MUA, i.e. changes to a D.S. AMAT with compact storage; it also allows to compress the matrix (see also CCMUA).

 
     SUBROUTINE CSAMAT(M,RAPORT,NFACTO,NFMUA,NIMUA,NFAMAT,NIAMAT,NTAMAT)
C ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
C AIM : ELIMINATE THE COEFFICIENTS A(I,J) OF THE I.D.S. MUA SUCH THAT
C ---               ABS(A(I,J)) < ABS(A(I,I)) * RATIO
C       MUA IN DIRECT ACCESS ( INPUT ) ==> AMAT SEQUENTIAL ( OUTPUT )
C              OR SEQUENTIAL
C ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

where

• M is the super array,
• RAPORT is the ratio used to eliminate the matrix coefficients,
• NFACTO is the matrix factorization option (0 : no factorization, 1 : Cholesky, 2 : Crout),
• NFMUA, NIMUA are the file number and level of input structure MUA,
• NFAMAT, NIAMAT and NTMAMT are the file number, the level and the number of arrays to associate to the output structure AMAT.

If NTAMAT is non-zero, the associated descriptive arrays must be input (see above).