sparsfun built-in function

I have a code that uses the sparsfun function, but when I run the code I get the following error:

Error using sparsfun
Unknown command option.

I try to get help on that function, but it does not exist and when I use the which function I get:

which('sparsfun')
built-in (undocumented)  % char method

Does anyone know about this function?

Answer 1

[Walter Roberson]

There is not even a single reference to sparsfun in the R2018b code in any .m in any of the toolboxes I have access to (many, but not all.)

It appears it was a routine that was used in the past to implement some of the sparse matrix operations.

There are a couple of commands documented for it in http://www.netlib.org/linalg/colamd/colamd_demo.m

The brief description from https://hwiegman.home.xs4all.nl/matlab4/sparsfun_m.htm also references nnz

You can find further hints at http://mseas.mit.edu/download/phaley/Matlab/Profile/Example/file50.html

It looks like matlab.internal.math.getOrSetSPPARMS() has replaced at least some of the uses.

[4lrdyD]

thanks a lot!!