How do I copy data to a new string variable in a C-MEX file?

I have created a string variable in my C-MEX file using mxCreateString. I would like to copy the content to a new string variable.

Answer 1

[MathWorks Support Team]

Use the mxArray* returned by the mxCreateString function to copy data to a new mxArray* as follows:

 #include "mex.h"

 void mexFunction( int nlhs, mxArray *plhs[],

                   int nrhs, const mxArray *prhs[] )

 {

 mxArray *origString, *userString;

 int arrayLen;

 /* Initialize */

 origString = mxCreateString("This is the primitive string");

 /* Copy values to new string */

 userString = origString;

 /* Determine array length */

 arrayLen = mxGetNumberOfElements(origString);

 printf("The array length is: %d \n", arrayLen);

 /* Remaining code is just for testing */

 plhs[0] = userString;

 return;

 }

To test the above mexFunction after building to a MEX file, for example mexFunction.mexw32, invoke:

y = mexFunction