/// <summary>
/// This returns a read-only vector of a <see cref="INumericColumn" />, but the data are copyied before. Thus, if you change the data
/// into the numeric column, the data of the returned vector is not influenced.
/// </summary>
/// <param name="col">The column to wrap.</param>
/// <returns>A read-only vector which contains data copied from the numeric column.</returns>
public static IROVector ToROVectorCopy(DataColumn col)
{
if (!(col is INumericColumn))
{
throw new ArgumentException("Argument col can not be wrapped to a vector because it is not a numeric column");
}
INumericColumn ncol = col as INumericColumn;
double[] vec = new double[col.Count];
for (int i = col.Count - 1; i >= 0; i--)
{
vec[i] = ncol[i];
}
return(VectorMath.ToROVector(vec));
}
/// <summary>
/// Returns a wrapper object, so that the returned vector is read only. Please note, that changes to the elements
/// of the underlying array in DoubleVector are reflected in the wrapper object, whereas when the array itself is changing,
/// the wrapper object will not reflect the changed.
/// </summary>
/// <returns></returns>
public IROVector <double> ToROVector()
{
return(VectorMath.ToROVector(_array, _array.Length));
}