diff --git a/system/plots.py b/system/plots.py
index 1b2f253..84b1989 100644
--- a/system/plots.py
+++ b/system/plots.py
@@ -187,7 +187,7 @@ class Plot (gtk.Frame):
 
     def set_project(self, project):
         self.project = project
-        
+
     
 class EmptyView (Plot):
     def __init__(self):
@@ -260,6 +260,8 @@ class ScatterPlot(Plot):
         x2, y2 = event2.xdata, event2.ydata
         ydata = self.yaxis_data
         xdata = self.xaxis_data
+
+        # find indices of selected area
         if x1>x2:
             if y1<y2:
                 index =scipy.nonzero((xdata<x1) & (xdata>x2) & (ydata>y1) & (ydata<y2))
@@ -274,7 +276,14 @@ class ScatterPlot(Plot):
                 #logger.log('debug','Selection y_start bigger than y_end')
                 index =scipy.nonzero((xdata>x1) & (xdata<x2) & (ydata<y1) & (ydata>y2))
 
-        ids = [id for id,ind in self.dataset[self.current_dim].items() if ind in index]
+        # generate ids for selected indices
+        reverse = {}
+        for key, value in self.dataset[self.current_dim].items():
+            reverse[value] = key
+        ids = []
+        for ind in index:
+            ids.append(reverse[ind])
+            
         self.project.set_selection(self.current_dim,ids)
 
     def update(self, key):