lib/rorschart/multiple_series.rb in rorschart-0.10.1 vs lib/rorschart/multiple_series.rb in rorschart-0.10.2

@@ -10,25 +10,24 @@
       }
     end
 
     def cols
       cols_with_dup = @pivot_series.inject([]) { |cols, series| 
-        cols + series.cols
+        cols + (series.cols || [])
       }
    
       cols_with_dup.uniq
-
     end
 
     def rows
       # create union of all series first columns, to represent all abscisse values available
       union_x = union_of_first_columns()
 
       # Preparation: store all series rows in a hash indexed by first column
       series_indexed = []
       @pivot_series.each { |serie|
-        series_indexed << index_series_by_first_col(serie)
+        series_indexed << index_series_by_first_col(serie) if !serie.cols.nil?
       }
 
       # The Merge:
       # For abscisse value, grab for each serie the corresponding row - or nil
       union_series = []
@@ -66,6 +65,6 @@
 
       serie_hash
     end
 
   end
-end
\ No newline at end of file
+end