📄 trendlinelogarithmic.aspx
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<%@ Page Language="C#" 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 Logarithm Sample</TITLE>
<script runat="server">
void Page_Load(Object sender,EventArgs e)
{
// This sample demonstrates the use of TrendLineLogarithmic from within Forecasting
//which find the best fitting logarithmical curve to sets of data
// The Forecast Chart
ForecastChart.Title="Forecast Logarithm";
ForecastChart.TempDirectory="temp";
ForecastChart.Debug=true;
ForecastChart.Size = "1000x400";
ForecastChart.LegendBox.Template ="%icon %name";
ForecastChart.XAxis.Scale = Scale.Normal;
SeriesCollection slogarithm = new SeriesCollection();
Series sampledata1 = new Series ("Sample 1");
for ( int i = 1; i < 10; i++) {
Element el = new Element();
el.YValue = Math.Log(i)* i + 2;
el.XValue = i ;
sampledata1.Elements.Add (el);
}
slogarithm.Add (sampledata1);
slogarithm[0].Type = SeriesType.Marker;
ForecastChart.SeriesCollection.Add (slogarithm);
// Here we create a series which will hold the Y values calculated with the LogarithmFit indicator
Series trendLineLogarithmic = new Series();
trendLineLogarithmic = ForecastEngine.TrendLineLogarithmic(sampledata1);
//The next two lines display on to the chart the logarithmic function used
// to fit the curve
trendLineLogarithmic.Elements[0].SmartLabel.Text = "Function: %Function";
trendLineLogarithmic.Elements[0].ShowValue = true;
trendLineLogarithmic.DefaultElement.Color = Color.FromArgb(255,99,49);
trendLineLogarithmic.Type = SeriesType.Spline;
ForecastChart.SeriesCollection.Add(trendLineLogarithmic);
}
</script>
</HEAD>
<BODY>
<DIV align="center">
<dotnet:Chart id="ForecastChart" runat="server"/>
</dotnet:Chart>
</DIV>
</BODY>
</HTML>
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