How to draw trendline in graph using Windows.Forms.DataVisualization.Charting control

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I have draw a chart using System.Windows.Forms.DataVisualization.Charting

I need to draw Trendline in graph,

how can i draw that ?

any hint ?

Thanks in advance

Posted 11-Jul-11 3:08am

koolprasad2003

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2 solutions

Solution 1

Calculate the trend coefficients in code (there are various third party stats libraries which will do this if you don't feel like transcribing the equations) and add it as a new series. As far as I see, the MS Chart control does not support trend lines directly.

You probably want to calculate the endpoints of the line after you've drawn all your primary series and ranged the axes, so a trend line covers the whole chart area.

Posted 11-Jul-11 3:56am

BobJanova

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koolprasad2003 12-Jul-11 0:44am

Nice answer, My 5

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koolprasad2003 · Accepted Answer · 2011-07-13T00:31:00

Yes..after lot of work around i got solution. following code snippet works for me.

chartCoRel.Series.Add("TrendLine");
                    chartCoRel.Series["TrendLine"].ChartType = SeriesChartType.Line;
                    chartCoRel.Series["TrendLine"].BorderWidth = 3;
                    chartCoRel.Series["TrendLine"].Color = Color.Red;
                    // Line of best fit is linear
                    string typeRegression = "Linear";//"Exponential";//
                    // The number of days for Forecasting
                    string forecasting = "1";
                    // Show Error as a range chart.
                    string error = "false";
                    // Show Forecasting Error as a range chart.
                    string forecastingError = "false";
                    // Formula parameters
                    string parameters = typeRegression + ',' + forecasting + ',' + error + ',' + forecastingError;
                    chartCoRel.Series[0].Sort(PointSortOrder.Ascending, "X");
                    // Create Forecasting Series.
                    chartCoRel.DataManipulator.FinancialFormula(FinancialFormula.Forecasting, parameters, chartCoRel.Series[0], chartCoRel.Series["TrendLine"]);