======================
Using SuperLU with CRS                                                   [TOC]
======================

Again, this example requires that __SuperLU__ (Version 4.3) is installed on
your system.

In a __previous example__ we used SuperLU for a sparse system matrix that was
stored in the compressed column storage format.  You also can use SuperLU
with sparse matrices stored in the *compressed row storage* format.  However,
you have to invert the _transpose flag_.  You also have to pass row index
vectors instead of column index vectors and vice versa.

Example Code
============
We basically recycle the __previous example__.  But we use a sparse matrix that
stores elements in the *compressed row storage* format.

:import: flens/examples/gecrs-superlu.cc [stripped, downloadable]

Some Notes
==========
:import: flens/examples/gecrs-superlu.cc [brief]


Compile
=======

  *--[SHELL]----------------------------------------------------------------*
  |                                                                         |
  |  cd flens/examples                                                      |
  |  g++ -Wall -std=c++11 -I../.. -I$HOME/SuperLU_4.3/SRC                +++|
  |      -L$HOME/SuperLU_4.3/lib -lsuperlu_4.3 -framework vecLib         +++|
  |      -o gecrs-superlu gecrs-superlu.cc                                  |
  |                                                                         |
  *-------------------------------------------------------------------------*

Run
===

  *--[SHELL]----------------------------------------------------------------*
  |                                                                         |
  |  cd flens/examples                                                      |
  |  ./gecrs-superlu                                                        |
  |                                                                         |
  *-------------------------------------------------------------------------*


:links:  SuperLU          -> http://crd-legacy.lbl.gov/~xiaoye/SuperLU/
         previous example -> doc:flens/examples/geccs-superlu

:navigate: __up__    -> doc:flens/examples/tutorial
           __back__  -> doc:flens/examples/gecrs-setup
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