Convert each row of matrix( float) in to a vector

.net, c#, c#-4.0, emgucv

Solution

You can use Buffer.BlockCopy or ArrayCopy instead of manually assigning each value in for

        static float[][] ToVectors(float[,] matrix)
    {

        var array = new float[matrix.GetLength(0)][];

        for (int i = 0; i < array.Length; i++)
        {
            array[i]=new float[matrix.GetLength(1)];
            Buffer.BlockCopy(matrix, i * matrix.GetLength(1), array[i], 0, matrix.GetLength(1) * sizeof(float));
        }


        return array;

    }

Problem

I have a float[n,128] array. Now I want to convert each row into a separate vector as following: // The code here is a Pseudo Code ``` int n=48; float[,] arrFloat=new float[n,128]; VectorOfFloat v1 = new VectorOfFloat(128); // Vn equals to number of n v1= arrFloat[0]; v2=arrFloat[1] . . . . Vn ``` What is the optimize way? I could possibly write the code as following, but I think there should be a better way: ``` List<VectorOfFloat> descriptorVec = new List<VectorOfFloat>(); VectorOfFloat v1 = new VectorOfFloat(); var temp = new float[128]; for (int i = 0; i < descriptors1.GetLength(0); i++) { for (int j = 0; j < descriptors1.GetLength(1); j++) { temp[j] = descriptors1[0, j]; } v1.Push(temp); descriptorVec.Add(v1); } ```

Original source