1 files changed, 16 insertions, 4 deletions

diff --git a/plugins/API/RowEvolution.php b/plugins/API/RowEvolution.php
index 9025eb3436..24e695c88b 100644
--- a/plugins/API/RowEvolution.php
+++ b/plugins/API/RowEvolution.php
@@ -19,6 +19,7 @@ use Piwik\DataTable\Filter\SafeDecodeLabel;
 use Piwik\DataTable\Row;
 use Piwik\Period;
 use Piwik\Piwik;
+use Piwik\Plugins\API\Filter\DataComparisonFilter;
 use Piwik\Site;
 use Piwik\Url;
 
@@ -36,7 +37,7 @@ class RowEvolution
         'getPageUrl'
     );
 
-    public function getRowEvolution($idSite, $period, $date, $apiModule, $apiAction, $label = false, $segment = false, $column = false, $language = false, $apiParameters = array(), $legendAppendMetric = true, $labelUseAbsoluteUrl = true)
+    public function getRowEvolution($idSite, $period, $date, $apiModule, $apiAction, $label = false, $segment = false, $column = false, $language = false, $apiParameters = array(), $legendAppendMetric = true, $labelUseAbsoluteUrl = true, $labelSeries = '')
     {
         // validation of requested $period & $date
         if ($period == 'range') {
@@ -49,7 +50,7 @@ class RowEvolution
         }
 
         $label = DataTablePostProcessor::unsanitizeLabelParameter($label);
-        $labels = Piwik::getArrayFromApiParameter($label);
+        $labels = Piwik::getArrayFromApiParameter($label, $onlyUnique = empty($labelSeries));
 
         $metadata = $this->getRowEvolutionMetaData($idSite, $period, $date, $apiModule, $apiAction, $language, $apiParameters);
 
@@ -72,7 +73,8 @@ class RowEvolution
                 $labels,
                 $column,
                 $legendAppendMetric,
-                $labelUseAbsoluteUrl
+                $labelUseAbsoluteUrl,
+                $labelSeries
             );
         } else {
             $data = $this->getSingleRowEvolution(
@@ -420,8 +422,13 @@ class RowEvolution
     /** Get row evolution for a multiple labels */
     private function getMultiRowEvolution(DataTable\Map $dataTable, $metadata, $apiModule, $apiAction, $labels, $column,
                                           $legendAppendMetric = true,
-                                          $labelUseAbsoluteUrl = true)
+                                          $labelUseAbsoluteUrl = true,
+                                          $labelSeries = '')
     {
+        $labelSeries = explode(',', $labelSeries);
+        $labelSeries = array_filter($labelSeries, 'strlen');
+        $labelSeries = array_map('intval', $labelSeries);
+
         if (!isset($metadata['metrics'][$column])) {
             // invalid column => use the first one that's available
             $metrics = array_keys($metadata['metrics']);
@@ -455,6 +462,11 @@ class RowEvolution
                 $cleanLabel = $this->cleanOriginalLabel($label);
                 $actualLabels[$labelIdx] = $cleanLabel;
             }
+
+            if (isset($labelSeries[$labelIdx])) {
+                $labelSeriesIndex = $labelSeries[$labelIdx];
+                $actualLabels[$labelIdx] .= ' ' . DataComparisonFilter::getPrettyComparisonLabelFromSeriesIndex($labelSeriesIndex);
+            }
         }
 
         // convert rows to be array($column.'_'.$labelIdx => $value) as opposed to