Error Bar

Add Error Bar

Aspose.Slides for PHP via Java 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 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.

  # Create an instance of Presentation class
  $pres = new Presentation();
  try {
    # Creating a bubble chart
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::Bubble, 50, 50, 400, 300, true);
    # Adding Error bars and setting its format
    $errBarX = $chart->getChartData()->getSeries()->get_Item(0)->getErrorBarsXFormat();
    $errBarY = $chart->getChartData()->getSeries()->get_Item(0)->getErrorBarsYFormat();
    $errBarX->isVisible();
    $errBarY->isVisible();
    $errBarX->setValueType(ErrorBarValueType::Fixed);
    $errBarX->setValue(0.1);
    $errBarY->setValueType(ErrorBarValueType::Percentage);
    $errBarY->setValue(5);
    $errBarX->setType(ErrorBarType::Plus);
    $errBarY->getFormat()->getLine()->setWidth(2.0);
    $errBarX->hasEndCap();
    # Saving presentation
    $pres->save("ErrorBars.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

Add Custom Error Bar Value

Aspose.Slides for PHP via Java provides a simple API for managing custom error bar values. The sample code applies when the 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 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 individual series data point.
6. Setting bars values and format.
7. Write the modified presentation to a PPTX file.

  # Create an instance of Presentation class
  $pres = new Presentation();
  try {
    # Creating a bubble chart
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::Bubble, 50, 50, 400, 300, true);
    # Adding custom Error bars and setting its format
    $series = $chart->getChartData()->getSeries()->get_Item(0);
    $errBarX = $series->getErrorBarsXFormat();
    $errBarY = $series->getErrorBarsYFormat();
    $errBarX->isVisible();
    $errBarY->isVisible();
    $errBarX->setValueType(ErrorBarValueType::Custom);
    $errBarY->setValueType(ErrorBarValueType::Custom);
    # Accessing chart series data point and setting error bars values for
    # individual point
    $points = $series->getDataPoints();
    $points->getDataSourceTypeForErrorBarsCustomValues()->setDataSourceTypeForXPlusValues(DataSourceType::DoubleLiterals);
    $points->getDataSourceTypeForErrorBarsCustomValues()->setDataSourceTypeForXMinusValues(DataSourceType::DoubleLiterals);
    $points->getDataSourceTypeForErrorBarsCustomValues()->setDataSourceTypeForYPlusValues(DataSourceType::DoubleLiterals);
    $points->getDataSourceTypeForErrorBarsCustomValues()->setDataSourceTypeForYMinusValues(DataSourceType::DoubleLiterals);
    # Setting error bars for chart series points
    for($i = 0; $i < java_values($points->size()) ; $i++) {
      $points->get_Item($i)->getErrorBarsCustomValues()->getXMinus()->setAsLiteralDouble($i + 1);
      $points->get_Item($i)->getErrorBarsCustomValues()->getXPlus()->setAsLiteralDouble($i + 1);
      $points->get_Item($i)->getErrorBarsCustomValues()->getYMinus()->setAsLiteralDouble($i + 1);
      $points->get_Item($i)->getErrorBarsCustomValues()->getYPlus()->setAsLiteralDouble($i + 1);
    }
    # Saving presentation
    $pres->save("ErrorBarsCustomValues.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }