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mxGetN (Fortran)

Number of columns in mxArray

Fortran Syntax

#include "fintrf.h"
mwPointer mxGetN(pm)
mwPointer pm


mxGetN return the numbers of columns in the specified mxArray.

If pm is an N-dimensional mxArray, mxGetN is the product of dimensions 2 through N. For example, if pm points to a four-dimensional mxArray having dimensions 13-by-5-by-4-by-6, mxGetN returns the value 120 (5 × 4 × 6). If the specified mxArray has more than two dimensions, then call mxGetDimensions to find out how many elements are in each dimension.

If pm points to a sparse mxArray, mxGetN still returns the number of columns, not the number of occupied columns.


Fortran does not have an equivalent of size_t. mwPointer is a preprocessor macro that provides the appropriate Fortran type. The value returned by this function, however, is not a pointer.

Input Arguments

expand all

Pointer to an mxArray array, specified as mwPointer.


See these examples in matlabroot/extern/examples/eng_mat:

Version History

Introduced before R2006a