typo

Author: pavelkomarov

pynumdiff/finite_difference/_finite_difference.py

@@ -28,7 +28,7 @@ def _finite_difference(x, dt, num_iterations, order):
         elif order == 4:
             dxdt_hat[2:-2] = (8*(x_hat[3:-1] - x_hat[1:-3]) - x_hat[4:] + x_hat[:-4])/12 # fourth-order center-difference
             dxdt_hat[1] = (x_hat[2] - x_hat[0])/2
-            dxdt_hat[-2] = (x_hat[-1] - x_hat[-3])/2 # use second-order formula for next-to-endpionts so as not to amplify noise
+            dxdt_hat[-2] = (x_hat[-1] - x_hat[-3])/2 # use second-order formula for next-to-endpoints so as not to amplify noise
             dxdt_hat[0] = x_hat[1] - x_hat[0]
             dxdt_hat[-1] = x_hat[-1] - x_hat[-2] # use first-order endpoint formulas so as not to amplify noise. See #104