2-D numeric matrix
#include "matrix.h" mxArray *mxCreateNumericMatrix(mwSize m, mwSize n, mxClassID classid, mxComplexity ComplexFlag);
mwPointer mxCreateNumericMatrix(m, n, classid, ComplexFlag) mwSize m, n integer*4 classid, ComplexFlag
Number of rows
Number of columns
Identifier for the class of the array, which determines the way the numerical data is represented in memory. For example, specifying mxINT16_CLASS in C causes each piece of numerical data in the mxArray to be represented as a 16-bit signed integer. In Fortran, use the function mxClassIDFromClassName to derive the classid value from a MATLAB® class name.
If the mxArray you are creating is to contain imaginary data, set ComplexFlag to mxCOMPLEX in C (1 in Fortran). Otherwise, set ComplexFlag to mxREAL in C (0 in Fortran).
Pointer to the created mxArray, if successful. If unsuccessful in a standalone (non-MEX-file) application, returns NULL in C (0 in Fortran). If unsuccessful in a MEX-file, the MEX-file terminates and returns control to the MATLAB prompt. The function is unsuccessful when there is not enough free heap space to create the mxArray.
Call mxCreateNumericMatrix to create a 2-D mxArray in which all data elements have the numeric data type specified by classid. After creating the mxArray, mxCreateNumericMatrix initializes all its real data elements to 0. If ComplexFlag equals mxCOMPLEX in C (1 in Fortran), mxCreateNumericMatrix also initializes all its imaginary data elements to 0. mxCreateNumericMatrix allocates dynamic memory to store the created mxArray. When you finish using the mxArray, call mxDestroyArray to destroy it.
The following table shows the C classid values and the Fortran data types that are equivalent to MATLAB classes.
MATLAB Class Name
C classid Value
single, with imaginary components
double, with imaginary components
See the following examples in matlabroot/extern/examples/refbook.
The following Fortran statements create a 4-by-3 matrix of REAL*4 elements having no imaginary components:
C Create 4x3 mxArray of REAL*4 mxCreateNumericMatrix(4, 3, + mxClassIDFromClassName('single'), 0)