lib/rorschart/data/multiple_series.rb in rorschart-0.19.0 vs lib/rorschart/data/multiple_series.rb in rorschart-0.19.1

@@ -30,18 +30,24 @@
       }
 
       # The Merge:
       # For abscisse value, grab for each serie the corresponding row - or nil
       union_series = []
+      asc = true
       union_x.each { |x|
         row = [x]
         series_indexed.each { |serie_hash|
           row << serie_hash[x]
+          asc = asc && ascending?(serie_hash)
         }
         union_series << row.flatten
       }
 
+      if !asc
+        union_series = union_series.reverse
+      end
+
       # Return union of all series
       union_series
     end
 
     private
@@ -60,9 +66,13 @@
       serie.rows.each { |row|
         serie_hash[row[0]] = row.drop(1)
       }
 
       serie_hash
+    end
+
+    def ascending? hsh
+      hsh.keys == hsh.keys.sort
     end
 
   end
 end