public DMatrix(float[][] data, float[] labels = null)
{
float[] data1D = Flatten2DArray(data);
ulong nrows = unchecked ((ulong)data.Length);
ulong ncols = unchecked ((ulong)data[0].Length);
int output = XGBoostNative.XGDMatrixCreateFromMat(data1D, nrows, ncols, Missing, out _handle);
if (output == -1)
{
throw new DllFailException(XGBoostNative.XGBGetLastError());
}
if (labels != null)
{
Label = labels;
}
}
