Bubble 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-Bubble.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;

// Set the chart type to bubble.
chart.ChartType = SpreadsheetGear.Charts.ChartType.Bubble;

// Get the chart's source data range.
SpreadsheetGear.IRange source = cells["G3:J6"];

// for each row in the data range...
for (int row = 0; row < source.RowCount; row++)
{
    // Add a series to the chart's series collection.
    SpreadsheetGear.Charts.ISeries series = chart.SeriesCollection.Add();

    // Set the series name, x values, y values, and bubble size values.
    series.Name = "=" + source[row, 0].Address;
    series.XValues = source[row, 1];
    series.Values = source[row, 2];
    series.BubbleSizes = source[row, 3];
}

// Get a reference to the x value axis, add a title, and link the title to a cell.
SpreadsheetGear.Charts.IAxis xValueAxis =
    chart.Axes[SpreadsheetGear.Charts.AxisType.Category];
xValueAxis.HasTitle = true;
xValueAxis.AxisTitle.Text = "=H2";

// Get a reference to the y value axis, add a title, and link the title to a cell.
SpreadsheetGear.Charts.IAxis yValueAxis =
    chart.Axes[SpreadsheetGear.Charts.AxisType.Value];
yValueAxis.HasTitle = true;
yValueAxis.AxisTitle.Text = "=I2";

// Add a chart title and change the font size.
chart.HasTitle = true;
chart.ChartTitle.Text = "Estimated Return on Investment";
chart.ChartTitle.Font.Size = 12;