Sparse matrix JC array
Pointer to the first element in the jc array, if successful, and NULL in C (0 in Fortran) otherwise. Possible causes of failure include
Specifying a full (nonsparse) mxArray.
Specifying a value for pm that is NULL in C (0 in Fortran). This usually means that an earlier call to mxCreateSparse failed.
Use mxGetJc to obtain the starting address of the jc array. The jc array is an integer array having n+1 elements, where n is the number of columns in the sparse mxArray. The values in the jc array indirectly indicate columns containing nonzero elements. For a detailed explanation of the jc array, see mxSetJc.
See the following examples in matlabroot/extern/examples/refbook.
See the following examples in matlabroot/extern/examples/mx.
See the following examples in matlabroot/extern/examples/mex.