Get the data out of the emxArray_real_T

Question

I have converted a simple code to C++ using Matlab coder. However, my main problem is that I cannot get its output! How can I convert the output which is an emxArray_real_T type to a C++ array and print it?

Answer 1

C Code Interface for Dynamically Allocated Arrays

In generated code, MATLAB represents dynamically allocated data as a structure type called emxArray. An embeddable version of the MATLAB mxArray, the emxArray is a family of data types, specialized for all base types. emxArray Structure Definition

typedef struct emxArray_<baseTypedef> {
    <baseType> *data;
    int *size;
    int allocatedSize;
    int numDimensions;
    boolean_T canFreeData; 
} emxArray_<baseTypedef>;

baseTypedef is the predefined type in rtwtypes.h corresponding to baseType. For example, here is the definition for an emxArray of base type double with unknown upper bounds:

typedef struct emxArray_real_T {
    double *data;    //<<<<<<<<<<<<<<< RIGHT HERE
    int *size;
    int allocatedSize;
    int numDimensions;
    boolean_T canFreeData; 
} emxArray_real_T;

The predefined type corresponding to double is real_T. For more information on the correspondence between built-in data types and predefined types in rtwtypes.h

http://www.mathworks.com/help/fixedpoint/ug/c-code-interface-for-unbounded-arrays-and-structure-fields.html?refresh=true