Update finite-difference.py

jussienko · web-flow · commit 5ae6f0d92d02 · 2020-09-11T10:51:26.000+03:00
diff --git a/numpy/finite-difference/solution/finite-difference.py b/numpy/finite-difference/solution/finite-difference.py
@@ -12,8 +12,8 @@
 
 # Compare to cos. Note that derivative was not defined in end points
 f_ref = np.cos(xi[1:-1])
-print("Mean squared difference:")
-print(np.sqrt(np.sum((dfi - f_ref)**2)))
+print("Root mean squared difference:")
+print(np.sqrt(np.mean((dfi - f_ref)**2)))
 plt.plot(xi[1:-1], dfi, label="sin'")
 plt.plot(xi[1:-1], f_ref, label="cos")
 plt.legend()
