Fix typo 'transistion' -> 'transition'

Author: nh2

docs/kalman/KalmanFilter.rst

@@ -50,7 +50,7 @@ H : ndarray (dim_z, dim_x)
     measurement function
 
 F : ndarray (dim_x, dim_x)
-    state transistion matrix
+    state transition matrix
 
 B : ndarray (dim_x, dim_u), default 0
     control transition matrix

filterpy/kalman/CubatureKalmanFilter.py

@@ -132,7 +132,7 @@ class CubatureKalmanFilter(object):
 
     fx : function(x, dt)
         function that returns the state x transformed by the
-        state transistion function. dt is the time step in seconds.
+        state transition function. dt is the time step in seconds.
 
     x_mean_fn : callable  (sigma_points, weights), optional
         Function that computes the mean of the provided sigma points

filterpy/kalman/UKF.py

@@ -67,7 +67,7 @@ class UnscentedKalmanFilter(object):
 
     fx : function(x,dt,**fx_args)
         function that returns the state x transformed by the
-        state transistion function. dt is the time step in seconds.
+        state transition function. dt is the time step in seconds.
 
     points : class
         Class which computes the sigma points and weights for a UKF

filterpy/kalman/fading_memory.py

@@ -102,7 +102,7 @@ class KalmanFilter now incorporates the `alpha` attribute, and should
         measurement function
 
     F : ndarray (dim_x, dim_x)
-        state transistion matrix
+        state transition matrix
 
     B : ndarray (dim_x, dim_u), default 0
         control transition matrix

filterpy/kalman/tests/ukf2.py

@@ -133,7 +133,7 @@ def __init__(self, dim_x, dim_z, dt, hx, fx, points,
 
         fx : function(x,dt)
             function that returns the state x transformed by the
-            state transistion function. dt is the time step in seconds.
+            state transition function. dt is the time step in seconds.
 
         points : class
             Class which computes the sigma points and weights for a UKF