How to convert a matrix to a multidimension array?

[Sullivanecidi]

Hello Again! Last time I asked that: how to convert a NDArray to a list? It can be implemented just as ToArray(). So, how about a matrix to an array? Say matrix[4,5] to double[,]?

[Nucs]

No builtin way to do that: heres a snippet that should work for your case

unsafe double[,] To2DArray(NDArray nd)
{
    var ret = new double[nd.shape[0], nd.shape[1]];
    fixed (double* dst = ret)
        Unsafe.CopyBlock(dst, nd.Unsafe.Address, (uint)(nd.size * sizeof(double)));

    return ret;
}