Merge pull request #267 from jasonmhead/patch-1

Update README.rst

Author: rlabbe

README.rst

@@ -154,7 +154,7 @@ Initialize the filter's matrices.
     my_filter.H = np.array([[1.,0.]])    # Measurement function
     my_filter.P *= 1000.                 # covariance matrix
     my_filter.R = 5                      # state uncertainty
-    my_filter.Q = Q_discrete_white_noise(2, dt, .1) # process uncertainty
+    my_filter.Q = Q_discrete_white_noise(dim=2, dt=0.1, var=0.1) # process uncertainty
 
 
 Finally, run the filter.