/// <summary>
/// Adds a new <see cref="XYvalues"/> objects to <see cref="dataGroups"/>.
/// </summary>
public XYvalues AddDataGroup(IEnumerable <double> Abscissas, IEnumerable <double> values)
{
var r = new XYvalues(null, Abscissas.ToArray(), values.ToArray());
return(AddDataGroup(r));
}
/// <summary>
/// Adds a new <see cref="XYvalues"/> objects to <see cref="dataGroups"/>.
/// </summary>
public XYvalues AddDataGroup(XYvalues dataGroup)
{
dataGroup.AddToArray(ref dataGroups);
return(dataGroup);
}