sparse >> Sparse matrix support
Generate sparse matrix
 speye 
 sprand 
 sprandn 
 sprandsym 
 spdiags 
 spconvert 
 spvcat sphcat
Manipulate sparse matrices
 sparse issparse 
 full
 is_sparse is_real_sparse is_complex_sparse
 spimag spreal
 spy 
 nnz 
 spfind spdump
 nonzeros 
 nzmax 
 spones 
 spfun 
 spalloc 
 spparms 
Linear algebra
 spinv splu
 svds= create an interface to <a href="http://www.caam.rice.edu/software/ARPACK/">ARPACK</a> and add it to octave-forge
 pcg
 pcr
Statistics
 spsum
 spstats
 spabs
Test
 fem_test sp_test
