Description

Fix aggregate chart xaxis labels when multiple statistics are plotted for a single yaxis object. The issue was that with multiple aggregate data series, the first trace determines the x axis labels for the chart. If the following data series objects contain xvalues that are not within the first trace then those values are ignored (null'ed).

The following snippet shows how the xvalues for each yaxis object starts as an empty array of null values. Values are only updated if a match exists within the xAxis object. Looking at getYAxis() in ComplexDataset.php

$xValues = array_fill(
                    0,
                    $this->_xAxisDataObject->getCount(),
                    null
                );

foreach ($subXAxisObject->getValues() as $xIndex => $xValue) {
                    $found = array_search(
                        $xValue,
                        $this->_xAxisDataObject->getValues(),
                        true
                    );

                    if ($found !== false) {
                        $newValues[$found] = $yAxisDataObject->getValue($xIndex);
                        $xIds[$found]      = $subXAxisObject->getId($xIndex);
                        $xValues[$found]   = $subXAxisObject->getValue($xIndex);

                        if (
                            $dataDescripterAndDataset->data_description
                                                     ->std_err
                        ) {
                            $newErrors[$found]
                                = $yAxisDataObject->getError($xIndex);
                        }
                    }
                } // foreach ($subXAxisObject->getValues() ...

The reason this was not an issue before is that Highcharts set categorical axis labels through the xAxis object, whereas, Plotly JS has its category labels set through the data object itself. This should have been changed from the start of the transistion to Plotly to use the xAxis object to receive the xAxis values.

Before:

After:

Motivation and Context

Aggregate charts that contain multiple statistics at once will have blank labels if the label does not exist in every trace.

Tests performed

Tested on my dev port

Checklist:

• The pull request description is suitable for a Changelog entry
• The milestone is set correctly on the pull request
• The appropriate labels have been added to the pull request