External Interfaces Reference |
Get total number of columns in mxArray
C Syntax
Arguments
array_ptr
Pointer to an mxArray
.
Returns
The number of columns in the mxArray
.
Description
Call mxGetN
to determine the number of columns in the specified mxArray
.
If array_ptr
is an N-dimensional mxArray
, mxGetN
is the product of dimensions 2 through N. For example, if array_ptr
points to a four-dimensional mxArray
having dimensions 13-by-5-by-4-by-6, then mxGetN
returns the value 120 (5x4x6). If the specified mxArray
has more than two dimensions and you need to know exactly how many elements are in each dimension, then call mxGetDimensions
.
If array_ptr
points to a sparse mxArray
, mxGetN
still returns the number of columns, not the number of occupied columns.
Examples
See convec.c
in the refbook
subdirectory of the examples
directory.
fulltosparse.c
, revord.c
, timestwo.c
, and xtimesy.c
in the refbook
subdirectory of the examples
directory.
explore.c
, mexget.c
, mexlock.c
, mexsettrapflag.c
and yprime.c
in the mex
subdirectory of the examples
directory.
mxmalloc.c
, mxsetdimensions.c
, mxgetnzmax.c
, and mxsetnzmax.c
in the mx
subdirectory of the examples
directory.
See Also
mxGetM
, mxGetNumberOfDimensions
, mxSetM
, mxSetN
mxGetM | mxGetName (Obsolete) |
© 1994-2005 The MathWorks, Inc.