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git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@9019 8e941d3f-bd1b-0410-a28a-d453659cc2b4
83 lines
2.7 KiB
ObjectPascal
83 lines
2.7 KiB
ObjectPascal
program regressionchart_write_demo;
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{.$DEFINE DARK_MODE}
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uses
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SysUtils,
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fpspreadsheet, fpstypes, fpsUtils, fpschart, xlsxooxml, fpsopendocument;
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const
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FILE_NAME = 'regression';
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var
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book: TsWorkbook;
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sheet: TsWorksheet;
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ch: TsChart;
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ser: TsScatterSeries;
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begin
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book := TsWorkbook.Create;
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try
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// worksheet
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sheet := book.AddWorksheet('regression_test');
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// Enter data
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sheet.WriteText(0, 0, 'Data');
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sheet.WriteFont(0, 0, '', 12, [fssBold], scBlack);
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sheet.WriteText (2, 0, 'x'); sheet.Writetext (2, 1, 'y');
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sheet.WriteNumber(3, 0, 1.1); sheet.WriteNumber(3, 1, 0.9);
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sheet.WriteNumber(4, 0, 1.9); sheet.WriteNumber(4, 1, 2.05);
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sheet.WriteNumber(5, 0, 2.5); sheet.WriteNumber(5, 1, 2.45);
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sheet.WriteNumber(6, 0, 3.1); sheet.WriteNumber(6, 1, 3.3);
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sheet.WriteNumber(7, 0, 5.2); sheet.WriteNumber(7, 1, 4.9);
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sheet.WriteNumber(8, 0, 6.8); sheet.WriteNumber(8, 1, 7.1); // sheet.WriteChartColor(8, 2, $FF8080);
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// Create chart: left/top in cell D4, 120 mm x 100 mm
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ch := book.AddChart(sheet, 2, 3, 120, 100);
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// Chart properties
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ch.Border.Style := clsNoLine;
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ch.Legend.Border.Style := clsNoLine;
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// Add scatter series
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ser := TsScatterSeries.Create(ch);
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// Series properties
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ser.SetTitleAddr(0, 0);
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ser.SetXRange(3, 0, 8, 0);
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ser.SetYRange(3, 1, 8, 1);
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ser.ShowLines := false;
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ser.ShowSymbols := true;
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ser.Symbol := cssCircle;
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ser.Regression.Title := 'Fit curve';
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ser.Regression.RegressionType := rtPolynomial; //rtLinear;
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ser.Regression.ExtrapolateForwardBy := 10;
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ser.Regression.ExtrapolateBackwardBy := 10;
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ser.Regression.Line.Color := scRed;
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ser.Regression.Line.Style := clsDash;
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ser.Regression.ForceYIntercept := true; // not used by logarithmic, power
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ser.Regression.YInterceptValue := 1.0;
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ser.Regression.PolynomialDegree := 2;
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ser.Regression.DisplayEquation := true;
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ser.Regression.DisplayRSquare := true;
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ser.Regression.Equation.XName := 'X';
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ser.Regression.Equation.YName := 'Y';
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ser.Regression.Equation.Border.Style := clsSolid;
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ser.Regression.Equation.Border.Color := scRed;
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ser.Regression.Equation.Fill.Style := cfsSolid;
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ser.Regression.Equation.Fill.Color := scSilver;
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ser.Regression.Equation.NumberFormat := '0.000';
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//ser.Regression.Equation.Top := 5;
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//ser.Regression.Equation.Left := 5;
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{
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book.WriteToFile(FILE_NAME + '.xlsx', true); // Excel fails to open the file
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WriteLn('Data saved with chart to ', FILE_NAME, '.xlsx');
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}
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book.WriteToFile('regression.ods', true);
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WriteLn('Data saved with chart to ', FILE_NAME, '.ods');
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finally
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book.Free;
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end;
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end.
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