Re: [Nplot-devel] candleplot question

[Dave C. <dav...@gm...>]

I've never used this technique to build candles. I've always used the
example code that uses a DataTable.
        chartDataTable = new DataTable();

        protected void DataTablePrepare(DataTable chartDataTable) {
            chartDataTable.Columns.Add(new DataColumn("StringDate",
typeof(string)));
            chartDataTable.Columns.Add(new DataColumn("Open",
typeof(double)));
            chartDataTable.Columns.Add(new DataColumn("High",
typeof(double)));
            chartDataTable.Columns.Add(new DataColumn("Low",
typeof(double)));
            chartDataTable.Columns.Add(new DataColumn("Close",
typeof(double)));
            chartDataTable.Columns.Add(new DataColumn("Volume",
typeof(double)));
            chartDataTable.Columns.Add(new DataColumn("CloseAdj",
typeof(double)));
            chartDataTable.Columns.Add(new DataColumn("Date",
typeof(DateTime)));
            chartDataTable.Columns.Add(new DataColumn("Sequence",
typeof(int)));
        }


Fill your datatable with data here:

if (addQuote)
   chartDataTable.Rows.Add(new object[] { datestring, quote.Open,
quote.High, quote.Low, quote.Close, quote.Volume, quote.PrevClose,
DateTime.Now, quoteSequence });


And then in your plot redraw method:

            // create CandlePlot.
            CandlePlot cp = new CandlePlot();
            cp.DataSource = chartDataTable;
            cp.AbscissaData = "Sequence";
            cp.OpenData = "Open";
            cp.HighData = "High";
            cp.LowData = "Low";
            cp.CloseData = "Close";
            cp.BearishColor = Color.Red;
            cp.BullishColor = Color.Green;
            cp.Style = CandlePlot.Styles.Filled;

            plotSurface.Add(cp, 1000);

On Thu, Jan 15, 2009 at 1:48 AM, dynamix . <dy...@li...> wrote:

> Hi,
>
> I have a problem with the candle plot.
> I created arrays of highs, lows, opens, closes and dates and this info
> displays fine if i create 4 line plots each with the same dateset based on
> each batch of info in those arrays. When i try to put that info into a
> candle plot display it either doesnt display anything or sometimes spits out
> a divide by 0 error.
> Im moving info from an arraylist to an array first - with the line plot
> either way it works, just not with the candle plot.
> I made a separate test app and that works fine, i dont see what im doing
> differently here?
>
> Here is my code.
>
> ElseIf strMainPlotType = "CandleStick" Then
>
>            Dim pqrs As Integer
>
>            pqrs = closedata1.Count - 1
>            Dim closedataarray As Double() = New Double(pqrs) {}
>            Dim opendataarray As Double() = New Double(pqrs) {}
>            Dim highdataarray As Double() = New Double(pqrs) {}
>            Dim lowdataarray As Double() = New Double(pqrs) {}
>            Dim datedataarray As Date() = New Date(pqrs) {}
>
>            For z = 0 To closedata1.Count - 1
>                closedataarray(z) = closedata1(z)
>                opendataarray(z) = opendata1(z)
>                highdataarray(z) = highdata1(z)
>                lowdataarray(z) = lowdata1(z)
>                datedataarray(z) = datedata1(z)
>            Next
>
>            cp.AbscissaData = datedataarray
>            cp.CloseData = closedataarray
>            cp.OpenData = opendataarray
>            cp.HighData = highdataarray
>            cp.LowData = lowdataarray
>
>            cp.Label = "Price"
>
>            cp.BearishColor = Color.Red
>            cp.BullishColor = Color.Green
>            cp.StickWidth = 8
>            cp.Color = Color.Yellow
>            'cp.Style = CandlePlot.Styles.Filled
>
> PlotSurface2D1.Add(cp, PlotSurface2D.XAxisPosition.Bottom,
> PlotSurface2D.YAxisPosition.Right)
>
>
>
>
> =
> Automatic Refractometers by Rudolph
> Bench top Automatic Refractometers by Rudolph.
>
> http://a8-asy.a8ww.net/a8-ads/adftrclick?redirectid=5e78fd4210a4b5b02f39232585fee78d
>
>
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