Index: fact/tools/pyscripts/pyfact/plotter.py
===================================================================
--- fact/tools/pyscripts/pyfact/plotter.py	(revision 12992)
+++ fact/tools/pyscripts/pyfact/plotter.py	(revision 12992)
@@ -0,0 +1,86 @@
+#!/usr/bin/python
+#
+# Werner Lustermann
+# ETH Zurich
+#
+# plotter.py
+
+import numpy as np
+import matplotlib.pyplot as plt
+
+class UniqueID(object):
+    """ provide a unique identifier accross objects """
+    
+    def __init__(self, start_value=1):
+        """ initialize the object """
+        
+        self.value = start_value
+        
+    def __call__(self):
+        """ return the present id and compute the next one """
+        
+        value = self.value
+        self.value += 1
+        
+        return(value)
+        
+def _test_UniqueID(start_value=1):
+    
+    fig_id = UniqueID(start_value)
+    
+    for i in range(10):
+        print 'fig_id: ', fig_id()
+        
+
+class Plotter(object):
+    """ simple x-y plot """
+    def __init__(self, name, x, my_id, style = 'b', xlabel='x', ylabel='y'):
+        """ initialize the object """
+        
+        self.name  = name
+        self.fig_id = my_id()
+        plt.figure(self.fig_id)
+        self.line, = plt.plot(x, style)
+        
+        plt.title(name)
+        plt.xlabel(xlabel)
+        plt.ylabel(ylabel)
+        plt.grid(True)
+           
+    def __call__(self, ydata):
+        """ set ydata of plot """
+        plt.figure(self.fig_id)
+        plt.ylim( np.min(ydata), np.max(ydata) )
+        self.line.set_ydata(ydata)
+        plt.draw()
+            
+def _test():
+    """ test of maintaining two independant plotter instances """
+    
+    plotter_id = UniqueID(1)
+    plt.ion()
+    
+    x = np.linspace(0., 10.)
+    plot1 = Plotter('plot1', x, plotter_id, 'r')
+    print 'plot1.fig_id: ', plot1.fig_id
+    plot2 = Plotter('plot2', x, plotter_id, 'g.')
+    #print 'plot2.fig_id: ', plot2.fig_id
+    
+    plot1(np.sin(x) * 7.)
+    plot2(x*x)
+    
+    raw_input('next')
+    
+    plot1(np.cos(x) * 3.)
+    plot2(x)
+    
+    raw_input('next')
+    
+    
+    
+if __name__ == '__main__':
+    """ test the class """
+    
+    #_test_UniqueID(0)
+    
+    _test()