matlab-coder

I have converted a function which takes a NxN matrix as input and gives a NxN matrix output from matlab to C, using the MatlabCoder. It gave me the function which has two parameters namely void func(const emxArray_real_T *x, emxArray_real_T *y) I get that x is the input to the function and i can get the output of the function from y. The problem is i have a array in float[][] and i wish to give this data as an input to the func, which only takes emxArray_real_T *x as an input. Any ideas on how to convert this float[][] data to emxArray_real_T *x emxArray_real_T has this structure struct

I seem to be one of few people using the Matlab coder (codegen command) to get speedup, judging by the fact that there is so little discussion or help on-line. I've gotten incredible speedups from it in some cases. I've never seen it documented, but when I make a MEX file using codegen from a Matlab script with a parfor loop, it often will thread the resulting MEX. Parfor in functions spawns multiple processes which is often less efficient than just threading (I'm inferring all this from watching top in linux and seeing multiple 100% processes in Matlab functions, but a single e.g. 1000%

I am trying to create a 'constructor' for this C# struct (initial attempt included): [StructLayout(LayoutKind.Sequential)] public struct emxArray_real_T { public IntPtr data; public IntPtr size; public int allocatedSize; public int numDimensions; [MarshalAs(UnmanagedType.U1)] public bool canFreeData; public emxArray_real_T(double[] cSharpData) { var arraySize = Marshal.SizeOf(cSharpData[0]) * cSharpData.Length; this.data = Marshal.AllocHGlobal(arraySize); // ???? numDimensions = 1; canFreeData = false; } } The C corresponding C struct looks like this: typedef struct emxArray_real_T { real_T

After segmenting an image into N superpixels, I need to specify the superpixels that are adjacent or non-adjacent to one superpixel and determine this relationship for all superpixels. [L,NumLabels] = superpixels(A,200); How can I specify the adjacent superpixels for each of superpixels ? Update I have tried the solution @Cris Luengo introduced. However the following errors arised : B=imread('H.jpg'); [L,N] = superpixels(B,200); glcms=graycomatrix(L); k=glcms(:,50); %SupNum=50 [r,~]=find(k>0); aa=find(r==50); r(aa)=[]; Update 2 I followed the instruction in MATLAB help but it doesn't work for

This question is an extension of this question . I would like to adapt the wrapper for the two dimensional case. This is my first attempt: public class EmxArrayRealTWrapper : IDisposable { private readonly emxArray_real_T _value; private GCHandle _dataHandle; private GCHandle _sizeHandle; public emxArray_real_T Value { get { return _value; } } public EmxArrayRealTWrapper(double[,] data) { _dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned); _value.data = _dataHandle.AddrOfPinnedObject(); _sizeHandle = GCHandle.Alloc(new int[] { data.GetLength(0), data.GetLength(1) }, GCHandleType.Pinned);

What's the difference between the two? As far as I understand it, MATLAB Compiler wraps the MATLAB code into a .exe file so that it can be used without installing MATLAB, and only requires the MCR. On top of it MATLAB Builder NE can also be used to produce .Net assemblies to be used with .Net framework instead of the .exe file, but they still require MCR. Now I don't understand what MATLAB Coder used for? It generates C/C++ code. But is the MATLAB code really converted into C/C++, or is it merely packaged like in the case of MATLAB Compiler? Does it also need the MCR to run? I understand that