Getting MATLAB Numeric Arrays from a Component

I am trying to create a dll for the following code for dotnetbuilder and use the same in C#.NET.

 function out = Fourier(x, n)
    x_mat = cell2mat(x);
    out = fft(x_mat,n);

The name of dll is "FourierTransform.dll". My C#.NET code is give below using System; using System.Collections.Generic; using System.Text;

using FourierTransform; using MathWorks.MATLAB.NET.Arrays; using MathWorks.MATLAB.NET.Utility;

namespace DLL { class Program { static void Main(string[] args) { ClassFFT obj = new ClassFFT();

            MWCellArray input = null;
            MWNumericArray result = null;

            input = new MWCellArray(1, 3);
            input[1] = new MWNumericArray(1);
            input[2] = new MWNumericArray(1);
            input[3] = new MWNumericArray(1);

            result = (MWNumericArray)obj.FourierTransform(1, input, 1);

            Double[] doubleArray = (Double[])result.ToVector(MWArrayComponent.Real);

            Console.WriteLine(doubleArray);
            Console.ReadKey();
        }
    }
}

The Visual studio gets crashed when the above code is run. Please help me if anybody knows why it is crashed...

Thanks, Srikanth

Answer 1

[Titus Edelhofer]

Hi Srikanth, you are nearly done. Some slight changes: although you have only one output argument, the method will return an array. Unfortunately you can't cast that array directly but with the following changes it works:

MWArray[] result = null;
...
result = (MWArray[])obj.Fourier(1, input, 1);
MWNumericArray result1 = (MWNumericArray) result[0];
Double[] doubleArray = (Double[]) result1.ToVector(MWArrayComponent.Real);

The last two lines may be combined of course, the intermediate variable result1 is just for better reading.

Titus

[Srikanth]

Hello Titus,

Thank you very much! It worked well.

Thanks,

Srikanth