MATLAB Application Program Interface Reference

Inquire if an mxArray is sparse

integer*4 function mxIsSparse(pm)
integer*4 pm

Arguments

Pointer to an mxArray.

Returns

1 if the mxArray is sparse, 0 otherwise.

Description

Use mxIsSparse to determine if an mxArray is stored in sparse form. Many routines (for example, mxGetIr and mxGetJc) require a sparse mxArray as input.

There are no corresponding set routines. Use mxCreateSparse to create sparse mxArrays.