mxGetJc (MATLAB Application Program Interface)

Get the jc array

Fortran Syntax

integer*4 function mxGetJc(pm)
integer*4 pm

Arguments

pm
Pointer to a sparse mxArray.

Returns

A pointer to the first element in the jc array, if successful; otherwise, returns 0. The most likely cause of failure is specifying a pointer that points to a full (nonsparse) mxArray.

Description

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.