How to create and store a custom structure from C++ into a matlab data file

I wish to generate a struct from c++ to provide the following collection structure in a MATLAB data file.

% Set(1,1).StrA String

% Set(1,1).StrB String

% Set(1,1).StrC String

% Set(1,1).StrD String

% Set(1,1).StrE String

% Set(1,1).Factors Array [ XA, YA, XB, YB, XC, YC, XD, YD, XE, YE ] of double

% Set(1,1).PrimaryMatrix Matrix 256x256 double

% Set(1,1).MaskMatrix Matrix 256x256 int32

% Set(1,1).StatX Matrix 3x256 single

% Set(1,1).StatY Matrix 3x256 single

%

% Set(1,2).StrA String

% Set(1,2).StrB String

% Set(1,2).StrC String

% Set(1,2).StrD String

% Set(1,2).StrE String

% Set(1,2).Factors Array [ XA, YA, XB, YB, XC, YC, XD, YD, XE, YE ] of double

% Set(1,2).PrimaryMatrix Matrix 256x256 double

% Set(1,2).MaskMatrix Matrix 256x256 int32

% Set(1,2).StatX Matrix 3x256 single

% Set(1,2).StatY Matrix 3x256 single

%

% set(1,n)...

The documentation seems pretty clear for standard matrices in a standalone c++ program, and I can create the desired structure in MATLAB, but I am unclear on how to create the nested structure in a standalone c++ program.

Thank you,

Steven.

Answer 1

[James Tursa]

E.g., a bare bones code outline:

mxArray *mx;
mxArray *Set;
char *fieldnames[] = {"StrA","StrB","StrC","StrD","StrE","Factors","PrimaryMatrix","MaskMatrix","StatX","StatY"};
mwSize n;

n = whatever;
Set = mxCreateStructMatrix(1, n, 10, fieldnames);

mx = mxCreateString("This is (1,1).StrA");
mxSetField(Set, 0, "StrA", mx);
//
mx = mxCreateString("This is (1,1).StrB");
mxSetField(Set, 0, "StrB", mx);
//
mx = mxCreateDoubleMatrix(1,10,mxREAL);
mxSetField(Set, 0, "Factors", mx);
//
mx = mxCreateNumericMatrix(256, 256, mxINT32_CLASS, mxREAL);
mxSetField(Set, 0, "MaskMatrix", mx);
//
mx = mxCreateNumericMatrix(3, 256, mxSINGLE_CLASS, mxREAL);
mxSetField(Set, 0, "StatX", mx);
//
// etc etc etc

For the (1,2) spots use the index 1 instead of 0, etc.