MATLAB: Can I create a dynamic array with the mwArray class of the MATLAB Compiler 4.1 (R14SP1) C++ Utility Library

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I would like to create arrays of variable sizes using the mwArray class in my C++ application.

Best Answer

It is possible to create dynamic arrays with the mwArray class in MATLAB Compiler 4.1 (R14SP1). Below is an example (testme.cpp) that will let the user define the size of 2 arrays:
#include "mclcppclass.h"
int main(){
      if (!mclInitializeApplication(NULL,0))
      {   std::cerr << "could not initialize the library properly"<<std::endl;
           return -1;
      }  
      try
      {   int x,y;
          int* a = NULL;
          int* b = NULL;              
          std::cout << "Enter length of array 1:" <<std::endl;
          std::cin >> x;          // Create input data
          std::cout << "Enter length of array 2:" <<std::endl;
          std::cin >> y;
          a = new int[x]; // Allocate x ints and save ptr in a.
          b = new int[y]; // Allocate y ints and save ptr in b.     
          for (int i=0; i<x; i++) {
              a[i] = i;    // Initialize all elements in increments of 1.
          }    
          for (int j=0; j<y; j++) {
              b[j] = 1;    // Initialize all elements to one.
          }    
          mwArray in1(1, x, mxDOUBLE_CLASS, mxREAL);
          mwArray in2(1, y, mxDOUBLE_CLASS, mxREAL);         
          in1.SetData(a, x);
          in2.SetData(b, y);        
          std::cout << "The 1st array is:" << std::endl;
          std::cout << in1 << std::endl;      
          std::cout << "The 2nd array is:" << std::endl;
          std::cout << in2 << std::endl;        
          delete [] a;  //When done free memory pointed to by a.
          a = NULL; 
          delete [] b;
          b = NULL;     //When done, free memory pointed to by b.
      }
      catch (const mwException& e)
      {   std::cerr << e.what() << std::endl;
          return -1;        
      }
      catch (...)
      {  std::cerr << "Unexpected error thrown" << std::endl;
          return -1;
      }   
      mclTerminateApplication();
      return 0;
   }
You can compile this example using the following command:
mbuild -v testme.cpp
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