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# MATAIJCRL
MATAIJCRL = "aijcrl" - A matrix type to be used for sparse matrices. 
## Options Database Key

- ***-mat_type aijcrl -*** sets the matrix type to "aijcrl" during a call to `MatSetFromOptions()`





## Note
This matrix type is identical to `MATSEQAIJCRL` when constructed with a single process communicator,
and `MATMPIAIJCRL` otherwise.  As a result, for single process communicators,
`MatSeqAIJSetPreallocation()` is supported, and similarly `MatMPIAIJSetPreallocation()` is supported
for communicators controlling multiple processes.  It is recommended that you call both of
the above preallocation routines for simplicity.


## See Also
 [](ch_matrices), `Mat`, `MatCreateMPIAIJCRL`, `MATSEQAIJCRL`, `MATMPIAIJCRL`, `MATSEQAIJCRL`, `MATMPIAIJCRL`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/aij/seq/aij.c.html#MATAIJCRL">src/mat/impls/aij/seq/aij.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/mat/impls/aij/seq/aij.c)


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