Error Bar

Add Error Bar

Aspose.Slides for C++ provides a simple API for managing error bar values. The sample code applies when using a custom value type. To specify a value, use the ErrorBarCustomValues property of a specific data point in the DataPoints collection of series:

1. Create an instance of the Presentation class.
2. Add a bubble chart on the desired slide.
3. Access the first chart series and set the error bar X format.
4. Access the first chart series and set the error bar Y format.
5. Setting bars values and format.
6. Write the modified presentation to a PPTX file.

For complete examples and data files, please go to https://github.com/aspose-slides/Aspose.Slides-for-C

	// The path to the documents directory.
	const String outPath = u"../out/ErrorBars_out.pptx";

	//Instantiate Presentation class that represents PPTX file
	SharedPtr<Presentation> pres = MakeObject<Presentation>();

	//Access first slide
	SharedPtr<ISlide> sld = pres->get_Slides()->idx_get(0);

	// Add chart with default data
	SharedPtr<IChart> chart = sld->get_Shapes()->AddChart(Aspose::Slides::Charts::ChartType::Bubble, 0, 0, 500, 500, true);

	// Adding custom Error chart and setting its format
	SharedPtr<IChartSeries> series = chart->get_ChartData()->get_Series()->idx_get(0);
	SharedPtr<IErrorBarsFormat> errBarX = series->get_ErrorBarsXFormat();
	SharedPtr<IErrorBarsFormat> errBarY = series->get_ErrorBarsYFormat();
	errBarX->set_IsVisible(true);
	errBarY->set_IsVisible(true);
	errBarX->set_ValueType(ErrorBarValueType::Fixed);
	errBarX->set_Value( 0.1f);
	errBarY->set_ValueType(ErrorBarValueType::Percentage);
	errBarX->set_Value(5);
	errBarX->set_Type (ErrorBarType::Plus);
	errBarY->get_Format()->get_Line()->set_Width(2);
	errBarX->set_HasEndCap ( true);

	// Saving presentation
	pres->Save(outPath, Aspose::Slides::Export::SaveFormat::Pptx);

Add Custom Error Bar

Aspose.Slides for C++ provides a simple API for managing custom error bar values. The sample code applies when IErrorBarsFormat.ValueType property is equal to Custom. To specify a value, use the ErrorBarCustomValues property of a specific data point in the DataPoints collection of series:

1. Create an instance of the Presentation class.
2. Add a bubble chart on the desired slide.
3. Access the first chart series and set the error bar X format.
4. Access the first chart series and set the error bar Y format.
5. Access the chart series individual data points and setting the Error Bar values for an individual series data point.
6. Setting bars values and format.
7. Write the modified presentation to a PPTX file.

For complete examples and data files, please go to https://github.com/aspose-slides/Aspose.Slides-for-C

	// The path to the documents directory.
	const String outPath = u"../out/ErrorBarsCustomValues_out.pptx";

	//Instantiate Presentation class that represents PPTX file
	SharedPtr<Presentation> pres = MakeObject<Presentation>();

	//Access first slide
	SharedPtr<ISlide> sld = pres->get_Slides()->idx_get(0);

	// Add chart with default data
	SharedPtr<IChart> chart = sld->get_Shapes()->AddChart(Aspose::Slides::Charts::ChartType::Bubble, 0, 0, 500, 500,true);

	// Adding custom Error chart and setting its format
	SharedPtr<IChartSeries> series = chart->get_ChartData()->get_Series()->idx_get(0);
	SharedPtr<IErrorBarsFormat> errBarX = series->get_ErrorBarsXFormat();
	SharedPtr<IErrorBarsFormat> errBarY = series->get_ErrorBarsYFormat();
	errBarX->set_IsVisible(true);
	errBarY->set_IsVisible(true);
	errBarX->set_ValueType(ErrorBarValueType::Custom);
	errBarY->set_ValueType(ErrorBarValueType::Custom);

	// Accessing chart series data point and setting error bars values for individual point
	SharedPtr<IChartDataPointCollection> points = series->get_DataPoints();
	points->get_DataSourceTypeForErrorBarsCustomValues()->set_DataSourceTypeForXPlusValues(DataSourceType::DoubleLiterals);
	points->get_DataSourceTypeForErrorBarsCustomValues()->set_DataSourceTypeForXMinusValues(DataSourceType::DoubleLiterals);
	points->get_DataSourceTypeForErrorBarsCustomValues()->set_DataSourceTypeForYPlusValues (DataSourceType::DoubleLiterals);
	points->get_DataSourceTypeForErrorBarsCustomValues()->set_DataSourceTypeForYMinusValues(DataSourceType::DoubleLiterals);

	// Setting error bars for chart series points
	for (int i = 0; i < points->get_Count(); i++)
	{
		points->idx_get(i)->get_ErrorBarsCustomValues()->get_XMinus()->set_AsLiteralDouble(i + 1);
		points->idx_get(i)->get_ErrorBarsCustomValues()->get_XPlus()->set_AsLiteralDouble (i + 1);
		points->idx_get(i)->get_ErrorBarsCustomValues()->get_YMinus()->set_AsLiteralDouble( i + 1);
		points->idx_get(i)->get_ErrorBarsCustomValues()->get_YPlus()->set_AsLiteralDouble ( i + 1);
	}

	// Saving presentation
	pres->Save(outPath, Aspose::Slides::Export::SaveFormat::Pptx);