Use Matlab cell array in a C/C++ program

How can I read a Matlab cell array stor开发者_Go百科ed as a .mat file and having 3*3*2 multidimensional double data into a c/c++ array ?

The MATLAB file format is documented here. Doesn't look too hairy.

Edit: Sorry, the link got corrupted.

Link against libmx.lib, libmat.lib, libeng.lib, and include the headers mat.h and engine.h. I'm ignoring the imaginary component of the data and assuming you know how to use the C++ STL. The code below is adequate, but an easier interface called mxWrapper is available here: http://www.mathworks.com/matlabcentral/fileexchange/28331-replacement-for-mwarray-using-matlab-engine

vector<double> readSomeNumbers() {

    vector<double> data;

    mxArray *pMx=load("c:\\someFile.mat", "foobar");

    if (!pMx) return data;

    ASSERT(mxGetClassID(pMx) == mxDOUBLE_CLASS);

    data.assign(mxGetPr(pMx), mxGetPr(pMx)+mxGetNumberOfElements(pMx));

    mxDestroyArray(pMx);

    return data;
}

mxArray *load(const string& fileName, const string& variableName)
{

    MATFile *pmatFile = matOpen(fileName.c_str(), "r");

    if(pmatFile == NULL) 
        return NULL;

    mxArray* pMx = matGetVariable(pmatFile, variableName.c_str());

    if(pMx == NULL) 
    {
        matClose(pmatFile);
        return NULL;
    }

    matClose(pmatFile);
    return pMx;
}

This doc describes the interface to read and write MAT files in C/C++:

http://www.mathworks.com/access/helpdesk/help/techdoc/matlab_external/f39876.html#f13830