Reading in sparse matrix

[mannickutd]

Is there an example of how to read in a sparse matrix stored in a .mat file?

[S-Dafarra]

Hi @mannickutd, thank you for opening the issue. Indeed, dealing with sparse matrices is something I missed.

For the moment, you can read any variable (even sparse ones) with the read method. The output is a Variable, that is basically an interface to a matvar_t variable. You can get this underline variable with the toMatio method and then use its interface (see https://github.com/tbeu/matio/blob/master/src/matio.h) to access the data. Clearly, this would force you to use the C interface instead.

For a long-term solution instead, it would be better to have a proper C++ interface. This is currently missing. The implementation shares similar difficulties as those needed to deal with complex variables (see #5), so this could take some time.