📄 trendlinepolynomial.aspx
字号:
<%@ Page Language="C#" Debug="true" Description="dotnetCHARTING Component" %>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Drawing2D" %>
<%@ Import Namespace="dotnetCHARTING"%>
<HTML>
<HEAD>
<TITLE>.netCHARTING Forecasting Sample</TITLE>
<script runat="server">
void Page_Load(Object sender,EventArgs e)
{
// This sample demonstrates the use of TrendLine Forecasting engine in order to
// find the function of best fit for the seventh degree polynom. The data used for which
// the polynom is fit is a set of data which represents a FX exchange rate over a given
// period of time.
// The Forecast Chart
ForecastChart.Title="Exchange";
ForecastChart.TempDirectory="temp";
ForecastChart.Debug=true;
ForecastChart.Size = "1000x800";
ForecastChart.LegendBox.Template ="%icon %name";
ForecastChart.YAxis.ScaleRange.ValueLow = 220;
//ForecastChart.XAxis.Scale = Scale.Normal;
// The Forecast data
DataEngine de = new DataEngine ();
de.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;data source=" + Server.MapPath("../../database/chartsample.mdb");
de.DateGrouping = TimeInterval.Days;
de.StartDate = new DateTime(1983,3,10,0,0,0);
de.EndDate = new DateTime(1984,12,10,23,59,59);
de.SqlStatement= @"SELECT ID, Value AS q FROM Exchange WHERE Data >= #STARTDATE# AND Data <= #ENDDATE# ORDER BY Data ";
//Add a series
SeriesCollection scForecast = de.GetSeries ();
ForecastChart.SeriesCollection.Add (scForecast);
scForecast[0].Name = "Exchange";
scForecast[0].Type = SeriesType.Spline;
/*
* Takes off the marker off the line and spline series.
*/
ForecastChart.DefaultSeries.DefaultElement.Marker = new ElementMarker (ElementMarkerType.None);
ForecastChart.ChartAreaLayout.Mode = ChartAreaLayoutMode.Vertical;
// We generate the best fitting curve of a 7th degree polynom.
Series trendLine = new Series();
trendLine = ForecastEngine.TrendLinePolynomial(scForecast[0], 7);
trendLine.Name = "7th Degree Polynomial";
trendLine.Type = SeriesType.Spline;
ForecastChart.SeriesCollection.Add(trendLine);
}
</script>
</HEAD>
<BODY>
<DIV align="center">
<dotnet:Chart id="ForecastChart" runat="server"/>
</dotnet:Chart>
</DIV>
</BODY>
</HTML>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -