--- a/python/moving.py	Thu Sep 23 17:24:31 2010 -0400
+++ b/python/moving.py	Sat Sep 25 11:33:07 2010 -0400
@@ -135,6 +135,7 @@
         '2-norm distance (Euclidean distance)'
         return sqrt(self.norm2Squared())
 
+    @staticmethod
     def distanceNorm2(p1, p2):
         return (p1-p2).norm2()
 
@@ -225,6 +226,15 @@
 #        return sqrt(sq)
         return [hypot(x,y) for x,y in zip(self.positions[0], self.positions[1])]
 
+    def cumulatedDisplacement(self):
+        displacement = 0
+        for i in xrange(self.length()-1):
+            displacement += Point.distanceNorm2(self.__getitem__(i),self.__getitem__(i+1))
+        return displacement
+
+    def wiggliness(self):
+        return self.cumulatedDisplacement()/float(Point.distanceNorm2(self.__getitem__(0),self.__getitem__(self.length()-1)))
+
     def getTrajectoryInInterval(self, inter):
         if inter.first >=0 and inter.last<= self.length():
             return Trajectory([self.positions[0][inter.first:inter.last],
@@ -271,6 +281,9 @@
     def getVelocities(self):
         return self.velocities
 
+    def getSpeeds(self):
+        return self.getVelocities().norm()
+
     def getPositionAt(self, i):
         return self.positions[i]