Chart Axis

Getting the Max Values on the Vertical Axis on Charts

Aspose.Slides for PHP via Java allows you to obtain the minimum and maximum values on a vertical axis. Go through these steps:

1. Create an instance of the Presentation class.
2. Access the first slide.
3. Add a chart with default data.
4. Get the actual maximum value on the axis.
5. Get the actual minimum value on the axis.
6. Get the actual major unit of the axis.
7. Get the actual minor unit of the axis.
8. Get the actual major unit scale of the axis.
9. Get the actual minor unit scale of the axis.

This sample code—an implementation of the steps above—shows you how to get the required values :

  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::Area, 100, 100, 500, 350);
    $chart->validateChartLayout();
    $maxValue = $chart->getAxes()->getVerticalAxis()->getActualMaxValue();
    $minValue = $chart->getAxes()->getVerticalAxis()->getActualMinValue();
    $majorUnit = $chart->getAxes()->getHorizontalAxis()->getActualMajorUnit();
    $minorUnit = $chart->getAxes()->getHorizontalAxis()->getActualMinorUnit();
    # Saves the presentation
    $pres->save("MaxValuesVerticalAxis_out.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

Swapping the Data between Axes

Aspose.Slides allows you to quickly swap the data between axes—the data represented on the vertical axis (y-axis) moves to the horizontal axis (x-axis) and vice versa.

This PHP code shows you how to perform the data swap task between axes on a chart:

  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::ClusteredColumn, 100, 100, 400, 300);
    # Switches rows and columns
    $chart->getChartData()->switchRowColumn();
    # Saves presentation
    $pres->save("SwitchChartRowColumns_out.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

Disabling the Vertical Axis for Line Charts

This PHP code shows you how to hide the vertical axis for a line chart:

  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::Line, 100, 100, 400, 300);
    $chart->getAxes()->getVerticalAxis()->setVisible(false);
    $pres->save("chart.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

Disabling the Horizontal Axis for Line Charts

This code shows you how to hide the horizontal axis for a line chart:

  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::Line, 100, 100, 400, 300);
    $chart->getAxes()->getHorizontalAxis()->setVisible(false);
    $pres->save("chart.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

Changing Category Axis

Using the CategoryAxisType property, you can specify your preferred category axis type (date or text). This code demonstrates the operation:

  $presentation = new Presentation("ExistingChart.pptx");
  try {
    $chart = $presentation->getSlides()->get_Item(0)->getShapes()->get_Item(0);
    $chart->getAxes()->getHorizontalAxis()->setCategoryAxisType(CategoryAxisType::Date);
    $chart->getAxes()->getHorizontalAxis()->setAutomaticMajorUnit(false);
    $chart->getAxes()->getHorizontalAxis()->setMajorUnit(1);
    $chart->getAxes()->getHorizontalAxis()->setMajorUnitScale(TimeUnitType::Months);
    $presentation->save("ChangeChartCategoryAxis_out.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($presentation)) {
      $presentation->dispose();
    }
  }

Setting the Date Format for Category Axis Value

Aspose.Slides for PHP via Java allows you to set the date format for a category axis value. The operation is demonstrated in this PHP code:

  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::Area, 50, 50, 450, 300);
    $wb = $chart->getChartData()->getChartDataWorkbook();
    $wb->clear(0);
    $chart->getChartData()->getCategories()->clear();
    $chart->getChartData()->getSeries()->clear();
    $chart->getChartData()->getCategories()->add($wb->getCell(0, "A2", convertToOADate(new GregorianCalendar(2015, 1, 1))));
    $chart->getChartData()->getCategories()->add($wb->getCell(0, "A3", convertToOADate(new GregorianCalendar(2016, 1, 1))));
    $chart->getChartData()->getCategories()->add($wb->getCell(0, "A4", convertToOADate(new GregorianCalendar(2017, 1, 1))));
    $chart->getChartData()->getCategories()->add($wb->getCell(0, "A5", convertToOADate(new GregorianCalendar(2018, 1, 1))));
    $series = $chart->getChartData()->getSeries()->add(ChartType::Line);
    $series->getDataPoints()->addDataPointForLineSeries($wb->getCell(0, "B2", 1));
    $series->getDataPoints()->addDataPointForLineSeries($wb->getCell(0, "B3", 2));
    $series->getDataPoints()->addDataPointForLineSeries($wb->getCell(0, "B4", 3));
    $series->getDataPoints()->addDataPointForLineSeries($wb->getCell(0, "B5", 4));
    $chart->getAxes()->getHorizontalAxis()->setCategoryAxisType(CategoryAxisType::Date);
    $chart->getAxes()->getHorizontalAxis()->setNumberFormatLinkedToSource(false);
    $chart->getAxes()->getHorizontalAxis()->setNumberFormat("yyyy");
    $pres->save("output.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

Setting the Rotation Angle for Chart Axis Title

Aspose.Slides for PHP via Java allows you to set the rotation angle for a chart axis title. This PHP code demonstrates the operation:

  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::ClusteredColumn, 50, 50, 450, 300);
    $chart->getAxes()->getVerticalAxis()->setTitle(true);
    $chart->getAxes()->getVerticalAxis()->getTitle()->getTextFormat()->getTextBlockFormat()->setRotationAngle(90);
    $pres->save("output.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

Setting the Position Axis in a Category or Value Axis

Aspose.Slides for PHP via Java allows you to set the position axis in a category or value axis. This PHP code shows how to perform the task:

  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::ClusteredColumn, 50, 50, 450, 300);
    $chart->getAxes()->getHorizontalAxis()->setAxisBetweenCategories(true);
    $pres->save("output.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

Enabling the Display Unit label on Chart Value Axis

Aspose.Slides for PHP via Java allows you to configure a chart to show a unit label on its chart value axis. This PHP code demonstrates the operation:

  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::ClusteredColumn, 50, 50, 450, 300);
    $chart->getAxes()->getVerticalAxis()->setDisplayUnit(DisplayUnitType::Millions);
    $pres->save("output.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }