private static VectorN FromMatrixInternal(ObjectMatrix <double> matrix)
{
if (matrix.Columns != 1)
{
throw new InvalidCastException("matrix must have only 1 column");
}
var vector = new VectorN(matrix.Rows);
for (var index = 0; index < matrix.Rows; index++)
{
vector[index] = matrix.GetValue(index, 0);
}
return(vector);
}