How to build a mex return structure?
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I am unable to figure out how to build and attach matrices to the structure I have being returned
mwSize dims[2] = {1,NumChans};
plhs[0] = mxCreateStructArray(2, dims, NUMBER_OF_FIELDS, field_names);
I want to place matrices in one of the fields where I'll have a different one for each structure element. I can't seem to find any examples how best to do this, would there possibly be such an example?
Thanks
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Accepted Answer
Adam
on 29 Jun 2016
Edited: Adam
on 29 Jun 2016
You can create an mxArray as you would anywhere else, e.g.
mxArray* myArray = mxCreateDoubleMatrix( 3, 4, mxREAL );
double* dataPtr = mxGetPr( myArray );
// Some code here to fill up myArray however you want using dataPtr
mxSetField( plhs[0], 0, field_names{1}, myArray ); // Assign matrix to first field name of 1st structure in array
mxSetField( plhs[1], 1, field_names{1}, myOtherArray ); // Assign matrix to first field name of 2nd structure in array
etc
with myOtherArray created by whatever method you choose also.
8 Comments
James Tursa
on 29 Jun 2016
Edited: James Tursa
on 29 Jun 2016
Can you post your current code or pseudo-code with comments as to what you want at the end of the process? I.e., "I want an X-element structure with fields named AAA, BBB, etc and each field will contain ETC ETC".
I am not really sure where you are getting stuck. Once you know how many elements you want (NumChans?), you loop through them to set the field values. Looks like you are doing that already, so I don't see where you are having problems with this.
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