示例#1
0
        public static HTQuadrature Series(DataSeries ds)
        {
            string description = string.Concat(new object[] { "HTQuadrature(", ds.Description, ")" });

            if (ds.Cache.ContainsKey(description))
            {
                return((HTQuadrature)ds.Cache[description]);
            }

            HTQuadrature _HTQuadrature = new HTQuadrature(ds, description);

            ds.Cache[description] = _HTQuadrature;
            return(_HTQuadrature);
        }
示例#2
0
        public HTPeriod(DataSeries ds, string description)
            : base(ds, description)
        {
            DataSeries InPhase    = HTInPhase.Series(ds);
            DataSeries Quadrature = HTQuadrature.Series(ds);

            DataSeries Phase      = new DataSeries(ds, "Phase");
            DataSeries Period     = new DataSeries(ds, "Period");
            DataSeries InstPeriod = new DataSeries(ds, "InstPeriod");
            DataSeries DeltaPhase = new DataSeries(ds, "DeltaPhase");

            double     Value  = 0.0;
            DataSeries Result = new DataSeries(ds, "Result");

            for (int bar = 7; bar < ds.Count; bar++)
            {
                // Compute the Period of the Dominant Cycle:

                //Use ArcTan to compute the current Phase
                if (Math.Abs(InPhase[bar] + InPhase[bar - 1]) > 0)
                {
                    Phase[bar] = Math.Atan(
                        Math.Abs((Quadrature[bar] + Quadrature[bar - 1]) / (InPhase[bar] + InPhase[bar - 1]))
                        ) * 180 / Math.PI; // Where WL4 required degrees, .NET uses radians!
                }
                // Resolve the ArcTan ambiguity
                if ((InPhase[bar] < 0) & (Quadrature[bar] > 0))
                {
                    Phase[bar] = 180 - Phase[bar];
                }
                if ((InPhase[bar] < 0) & (Quadrature[bar] < 0))
                {
                    Phase[bar] = 180 + Phase[bar];
                }
                if ((InPhase[bar] > 0) & (Quadrature[bar] < 0))
                {
                    Phase[bar] = 360 - Phase[bar];
                }

                //Compute A Differential Phase
                //Resolve phase wraparound, and limit delta phase errors
                DeltaPhase[bar] = Phase[bar - 1] - Phase[bar];
                if ((Phase[bar - 1] < 90) & (Phase[bar] > 270))
                {
                    DeltaPhase[bar] = 360 + Phase[bar - 1] - Phase[bar];
                }
                if (DeltaPhase[bar] < 1)
                {
                    DeltaPhase[bar] = 1;
                }
                if (DeltaPhase[bar] > 60)
                {
                    DeltaPhase[bar] = 60;
                }

                //Sum DeltaPhases to reach 360 degrees
                //The sum is the instantaneous period
                InstPeriod[bar] = 0;
                Value           = 0;

                for (int Count = bar; Count >= 0; Count--)
                {
                    Value += DeltaPhase[Count];
                    if ((Value > 360) & (InstPeriod[bar] == 0))
                    {
                        InstPeriod[bar] = bar - Count;
                        break;
                    }
                }

                //Resolve Instantaneous Period errors and smooth
                if (InstPeriod[bar] == 0)
                {
                    InstPeriod[bar] = InstPeriod[bar - 1];
                }
                Period[bar] = 0.25 * InstPeriod[bar] + 0.75 * Period[bar - 1];

                //Return the Hilbert Transform Period measured at the current bar:
                Result[bar] = Math.Truncate(Period[bar]);

                base[bar] = Result[bar];
            }
        }