Пример #1
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 ///Cloner Constructor:
 public ChartPoint(ChartPoint point)
 {
     this.x = point.x;
     this.y = point.y;
 }
Пример #2
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        /// <summary>
        /// Add a new point to this series:
        /// </summary>
        /// <param name="time">Time of the chart point</param>
        /// <param name="value">Value of the chart point</param>
        /// <param name="liveMode">This is a live mode point</param>
        public void AddPoint(DateTime time, decimal value, bool liveMode = false)
        {
            if (Values.Count >= 4000 && !liveMode)
            {
                // perform rate limiting in backtest mode
                return;
            }

            var chartPoint = new ChartPoint(time, value);
            if (Values.Count > 0 && Values[Values.Count - 1].x == chartPoint.x)
            {
                // duplicate points at the same time, overwrite the value
                Values[Values.Count - 1] = chartPoint;
            }
            else
            {
                Values.Add(chartPoint);
            }
        }
Пример #3
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 ///Cloner Constructor:
 public ChartPoint(ChartPoint point) 
 {
     x = point.x;
     y = point.y.SmartRounding();
 }
Пример #4
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 ///Cloner Constructor:
 public ChartPoint(ChartPoint point)
 {
     x = point.x;
     y = point.y;
 }
Пример #5
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        /// <summary>
        /// Linear interpolation used for sampling
        /// </summary>
        private static decimal Interpolate(ChartPoint previous, ChartPoint current, long target)
        {
            var deltaTicks = current.x - previous.x;

            // if they're at the same time return the current value
            if (deltaTicks == 0)
            {
                return current.y;
            }

            double percentage = (target - previous.x) / (double)deltaTicks;

            //  y=mx+b
            return (current.y - previous.y) * (decimal)percentage + previous.y;
        }
Пример #6
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 ///Cloner Constructor:
 public ChartPoint(ChartPoint point)
 {
     x = point.x;
     y = point.y.SmartRounding();
 }
Пример #7
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 ///Cloner Constructor:
 public ChartPoint(ChartPoint point)
 {
     x = point.x;
     y = Round(point.y);
 }
Пример #8
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        /// <summary>
        /// Linear interpolation used for sampling
        /// </summary>
        private static decimal Interpolate(ChartPoint previous, ChartPoint current, long target)
        {
            var deltaTicks = current.x - previous.x;
            double percentage = (target - previous.x) / (double)deltaTicks;

            //  y=mx+b
            return (current.y - previous.y) * (decimal)percentage + previous.y;
        }
Пример #9
0
 ///Cloner Constructor:
 public ChartPoint(ChartPoint point)
 {
     this.x = point.x;
     this.y = point.y;
 }
Пример #10
0
 ///Cloner Constructor:
 public ChartPoint(ChartPoint point)
 {
     x = point.x;
     y = point.y;
 }
Пример #11
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        /// <summary>
        /// Samples the given series
        /// </summary>
        /// <param name="series">The series to be sampled</param>
        /// <param name="start">The date to start sampling, if before start of data then start of data will be used</param>
        /// <param name="stop">The date to stop sampling, if after stop of data, then stop of data will be used</param>
        /// <returns>The sampled series</returns>
        public Series Sample(Series series, DateTime start, DateTime stop)
        {
            var sampled = new Series(series.Name, series.SeriesType);

            // chart point times are always in universal, so force it here as well
            double nextSample   = Time.DateTimeToUnixTimeStamp(start.ToUniversalTime());
            double unixStopDate = Time.DateTimeToUnixTimeStamp(stop.ToUniversalTime());

            // we can't sample a single point and it doesn't make sense to sample scatter plots
            // in this case just copy the raw data
            if (series.Values.Count < 2 || series.SeriesType == SeriesType.Scatter)
            {
                // we can minimally verify we're within the start/stop interval
                foreach (var point in series.Values)
                {
                    if (point.x >= nextSample && point.x <= unixStopDate)
                    {
                        sampled.Values.Add(point);
                    }
                }
                return(sampled);
            }

            var enumerator = series.Values.GetEnumerator();

            // initialize current/previous
            enumerator.MoveNext();
            ChartPoint previous = enumerator.Current;

            enumerator.MoveNext();
            ChartPoint current = enumerator.Current;

            // make sure we don't start sampling before the data begins
            if (nextSample < previous.x)
            {
                nextSample = previous.x;
            }

            // make sure to advance into the requestd time frame before sampling
            while (current.x < nextSample && enumerator.MoveNext())
            {
                previous = current;
                current  = enumerator.Current;
            }

            do
            {
                // advance our current/previous
                if (nextSample > current.x)
                {
                    if (enumerator.MoveNext())
                    {
                        previous = current;
                        current  = enumerator.Current;
                    }
                    else
                    {
                        break;
                    }
                }

                // iterate until we pass where we want our next point
                while (nextSample <= current.x && nextSample <= unixStopDate)
                {
                    var value = Interpolate(previous, current, (long)nextSample);
                    sampled.Values.Add(new ChartPoint {
                        x = (long)nextSample, y = value
                    });
                    nextSample += _seconds;
                }

                // if we've passed our stop then we're finished sampling
                if (nextSample > unixStopDate)
                {
                    break;
                }
            }while (true);

            return(sampled);
        }
Пример #12
0
        /// <summary>
        /// Samples the given series
        /// </summary>
        /// <param name="series">The series to be sampled</param>
        /// <param name="start">The date to start sampling, if before start of data then start of data will be used</param>
        /// <param name="stop">The date to stop sampling, if after stop of data, then stop of data will be used</param>
        /// <returns>The sampled series</returns>
        public Series Sample(Series series, DateTime start, DateTime stop)
        {
            var sampled = new Series(series.Name, series.SeriesType);

            if (series.Values.Count < 2)
            {
                // return new instance, but keep the same data
                sampled.Values.AddRange(series.Values);
                return(sampled);
            }

            double nextSample   = Time.DateTimeToUnixTimeStamp(start);
            double unixStopDate = Time.DateTimeToUnixTimeStamp(stop);

            var enumerator = series.Values.GetEnumerator();

            // initialize current/previous
            enumerator.MoveNext();
            ChartPoint previous = enumerator.Current;

            enumerator.MoveNext();
            ChartPoint current = enumerator.Current;

            // make sure we don't start sampling before the data begins
            if (nextSample < previous.x)
            {
                nextSample = previous.x;
            }

            // make sure to advance into the requestd time frame before sampling
            while (current.x < nextSample && enumerator.MoveNext())
            {
                previous = current;
                current  = enumerator.Current;
            }

            do
            {
                // advance our current/previous
                if (nextSample > current.x)
                {
                    if (enumerator.MoveNext())
                    {
                        previous = current;
                        current  = enumerator.Current;
                    }
                    else
                    {
                        break;
                    }
                }

                // iterate until we pass where we want our next point
                while (nextSample <= current.x && nextSample <= unixStopDate)
                {
                    var value = Interpolate(previous, current, (long)nextSample);
                    sampled.Values.Add(new ChartPoint {
                        x = (long)nextSample, y = value
                    });
                    nextSample += _seconds;
                }

                // if we've passed our stop then we're finished sampling
                if (nextSample > unixStopDate)
                {
                    break;
                }
            }while (true);

            return(sampled);
        }