Matrix Multiplication in C#

[tinkerz]

How do I get the length of rows and columns in a array with rows and columns

the columns being the 2nd number in [2,3], or 3 in this case, with the rows on the first data item,2?

Thanks

// matrix-matrix multiplication
private double [,] MMulti( double [,]A,double [,]B)
{
//Multiply two matrices together. They can be of any dimensions, so long as the number of columns of the first matrix is equal to the number of rows of the second matrix.    

//if(a[0].length != b.length) return null; //invalid dims
    
int n=2;//no of columns A
int m=1;//no of rows A
int p=2;// number of colums B
    
double [,]C = new double[m,p];

for (int i = 0; i < m; ++i)
{
    for (int j = 0; j < p; ++j)
    {
        C[i, j] = 0;
        for (int k = 0; k < n; ++k)
        {
            C[i, j] += A[i, k] * B[k, j];
        }
    }
}
return C;
}

[bobbell]

I am totally a greenhand of matrix in C#.The data of matrix is a little complicated for me.I met the similiar problem,have you find your answer?
I have a function which takes 2D array. I am wondering if there is anyway to get rows and columns of the 2D array without having to iterate on it. Method signature is not to be changes.
Function is inside the ninetyDegRotator class.

public static int [][] rotate(int [][] matrix){      int [][] rotatedMatrix = new int[4][4];//need actual row n col count here     //logic     return rotatedMatrix;  }

and main code is

public static void main(String args[]){ int [][] matrix = new int[][]{ {1,2,3,4}, {5,6,7,8}, {9,0,1,2}, {3,4,5,6} }; System.out.println("length is " + matrix.length); int [][] rotatedMatrix = ninetyDegRotator.rotate(matrix); }

Also matrix.length gives me 4. So I guess it is number of rows that it gives meaning number of references in 1D array which themselves contain arrays. So is there a way to get the count without iterating?

[NinjaTrader_Bertrand]

Hi Bob, this would not be directly a C# item we could fully support here, however I think those resources would help - http://stackoverflow.com/questions/6...-2-matrix-in-c