**CXML **
##
dcreate_diag_genr

Generate diagonal preconditioner for general storage by
rows (Serial and Parallel Versions)

#### FORMAT

**DCREATE_DIAG_GENR** (*a*, *ia*, *ja*, *nz*, *p*, *n*)

#### Arguments

**a** real*8
On entry, a one-dimensional array of length at least nz
containing the nonzero elements of the matrix A.
On exit, *a* is unchanged.
**ia** integer*4
On entry, a one-dimensional array of length at least
n+1, containing the starting indices of each row in
arrays JA and A.
On exit, *ia* is unchanged.
**ja** integer*4
On entry, a one-dimensional array of length at least
nz, containing the column values of each nonzero
element of the matrix A.
On exit, *ja* is unchanged.
**nz** integer*4
On entry, the number of nonzero elements stored in
array A.
On exit, *nz* is unchanged.
**p** real*8
On entry, a one-dimensional array of length at least n.
On exit, array P contains information for use by the
diagonal preconditioner.
**n** integer*4
On entry, the order of the matrix A.
On exit, *n* is unchanged.

#### Description

DCREATE_DIAG_GENR computes the information required by the diagonal
preconditioner for a sparse matrix stored using the general storage by rows
scheme. The real part of this information is returned in the array P.
There is no integer information returned for this preconditioner.
The routine DCREATE_DIAG_GENR is called prior to a call to one of the
iterative solver routines with diagonal preconditioning.
This routine is available in both serial and parallel versions. The routine
names and parameter list are identical for both versions. For information
about linking to the serial or to the parallel library, refer to the CXML
Reference Manual.

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