Call questdlg from C S-Function

2014 1 28
2 个回答
回答已采纳
更新时间：2014 4 14
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0 个投票

Hello, Is it possible to call questdlg(...) from within a simple C S-Function AND get the resulting answer? Please provide an example. Thank You

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Allen Peacock
Allen Peacock 2014-4-14
Hello and thanks for the quick response. I have followed your reference and this is what I produced:
#include "mex.h"
void
mexFunction( int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
mxArray *lhs[1];
char sArray[15] = "Are you sure?";
(void) prhs; /* unused parameter */
/* Check for proper number of input and output arguments */
if (nrhs != 0) {
mexErrMsgTxt("No input arguments required.");
}
if(nlhs > 1){
mexErrMsgTxt("Too many output arguments.");
}
/* Display a question dialog & get response */
mexCallMATLAB(1, lhs, 1, sArray, "questdlg");
}
It mex's without error. Unfortunately I get a Stack Dump/Trace when calling it. Not sure why it fails. Can you help?

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 采纳的回答

A Jenkins
A Jenkins 2014-4-14

0 个投票

You can use mxCreateString to hold your string value.
#include "mex.h"
void
mexFunction( int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
mxArray *lhs[1];
mxArray *pArray;
const char sArray[] = "Are you sure?";
/* Check for proper number of input and output arguments */
if (nrhs != 0) {
mexErrMsgTxt("No input arguments required.");
}
if(nlhs > 1){
mexErrMsgTxt("Too many output arguments.");
}
/* Create a string array. */
pArray = mxCreateString(sArray);
/* Display a question dialog & get response */
mexCallMATLAB(1, lhs, 1, &pArray, "questdlg");
/* Write the output back to MATLAB */
plhs[0] = lhs[0];
/* When finished with the string array, free its memory. */
mxDestroyArray(pArray);
}

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Kaustubha Govind
Kaustubha Govind 2014-3-31

0 个投票

Yes, you can use mexCallMATLAB to call MATLAB functions from a C-MEX S-function. Please refer to the examples in the documentation.

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Allen Peacock
Allen Peacock 2014-4-14
Sorry, I may have put my response/question in the wrong spot. Here it is again: Hello and thanks for the quick response. I have followed your reference and this is what I produced:
#include "mex.h"
void
mexFunction( int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
mxArray *lhs[1];
char sArray[15] = "Are you sure?";
(void) prhs; /* unused parameter */
/* Check for proper number of input and output arguments */
if (nrhs != 0) {
mexErrMsgTxt("No input arguments required.");
}
if(nlhs > 1){
mexErrMsgTxt("Too many output arguments.");
}
/* Display a question dialog & get response */
mexCallMATLAB(1, lhs, 1, sArray, "questdlg");
}
It mex's without error. Unfortunately I get a Stack Dump/Trace when calling it. Not sure why it fails. Can you help?

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