External Interfaces Reference |
C Syntax
Arguments
array_ptr
Pointer to a sparse mxArray
.
Returns
A pointer to the first element in the jc
array, if successful, and NULL
otherwise. The most likely cause of failure is specifying an array_ptr
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
.
Examples
See fulltosparse.c
in the refbook
subdirectory of the examples
directory.
For additional examples, see explore.c
in the mex
subdirectory of the examples
directory; see mxgetnzmax.c
, mxsetdimensions.c
, and mxsetnzmax.c
in the mx
subdirectory of the examples
directory.
See Also
mxGetIr | mxGetLogicals |
© 1994-2005 The MathWorks, Inc.