Radar Chart SpreadsheetGear API Sample

// Create a new workbook and get a reference to the active worksheet, window info, 
// and cells.
SpreadsheetGear.IWorkbook workbook =  
    SpreadsheetGear.Factory.GetWorkbook("ChartData-Radar.xlsx");
SpreadsheetGear.IWorksheet worksheet = workbook.ActiveWorksheet;
SpreadsheetGear.IWorksheetWindowInfo windowInfo = worksheet.WindowInfo;
SpreadsheetGear.IRange cells = worksheet.Cells;

// Add a chart to the worksheet's shape collection.
// NOTE: Calculate the coordinates of the chart by converting row and column
//       coordinates to points.  Use fractional row and column values to get 
//       coordinates anywhere in between row and column boundaries.
double left = windowInfo.ColumnToPoints(0.15);
double top = windowInfo.RowToPoints(0.5);
double right = windowInfo.ColumnToPoints(5.85);
double bottom = windowInfo.RowToPoints(13.5);
SpreadsheetGear.Charts.IChart chart =
    worksheet.Shapes.AddChart(left, top, right - left, bottom - top).Chart;

// Get the source data range from an existing defined name.
SpreadsheetGear.IRange source = workbook.Names["Maintenance"].RefersToRange;

// Set the chart's source data range, plotting series in columns.
chart.SetSourceData(source, SpreadsheetGear.Charts.RowCol.Columns);

// Set the chart type to filled radar.
chart.ChartType = SpreadsheetGear.Charts.ChartType.RadarFilled;

// Add a chart title and change the font size.
chart.HasTitle = true;
chart.ChartTitle.Text = "Seasonal Maintenance Costs";
chart.ChartTitle.Font.Size = 12;