Language.Expression.Eval C# (CSharp) Method

        public IEnumerable<Value> Eval(params Value[] args)
        {
            return Eval(args.AsEnumerable());
        }

        public override IEnumerable <Value> Eval(IEnumerable <Value> args)
        {
            foreach (Value v in child.Eval(args))
            {
                if (!(v is Frame))
                {
                    throw new InvalidOperationException("BoxCox only works on frames");
                }

                Frame f = v as Frame;

                Frame r = new Frame();
                for (int i = 0; i < f.Columns.Count(); i++)
                {
                    Vector vec = f.Columns[i];

                    if (!(vec is Numeric))
                    {
                        throw new InvalidOperationException("BoxCox only works on numeric variables");
                    }

                    Numeric n = vec as Numeric;

                    List <double> l = evaluate(n.vector).ToList();

                    r.Columns.Add(new Numeric(l, evaluate(n.Domain)));
                    r.Symbols.Add(new Symbol(MakeName(f.Symbols[i].Name)));
                }
                yield return(r);
            }
        }