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itpack.h File Reference

Declarations of functions from itpack. More...

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Namespaces

namespace  itk
namespace  itk::fem
namespace  itk::fem::itpack


Detailed Description

Declarations of functions from itpack.

The following are the common parameters that are used when calling functions. Note: Variables names are consistent with itpack to prevent confusion.

nn Order of linear system a Row pointers used in compressed row storage format m ja Column indices used in compressed row storage format

Parameters:
a  Nonzero entries in compressed row storage format
rhs  Right hand side of linear system
u  Initial guess of solution. holds solution on output
iwksp  Vector of length 3*nn. on output: holds permutation vector, its inverse, and integer workspace
nw  On input: length of wksp, on output: actual amount used
wksp  Vector used for real working space. must be at least nw in length
iparm  Vector of length 12 used to initialize various parameters on input
rparm  Vector of length 12 used to initialize various parameters on input
ierr  Error flag, on output: zero=no error, non-zero=error condition
nz  Number of non-zero entries in matrix
iwork  Vector of length nz. matrix creation workspace
i  Matrix index
j  Matrix index
value  Matrix entry
mode  Type of matrix building
level  Error reporting flag
nout  Error reporting location
ier  Error flag for matrix building

Definition in file itpack.h.


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