From: Michael Orlitzky <michael@orlitzky.com>
Date: Thu, 18 Oct 2012 15:20:02 +0000 (-0400)
Subject: Use the 2-norm instead of the infty-norm for the fixed point error ratios.
X-Git-Url: https://gitweb.michael.orlitzky.com/?a=commitdiff_plain;h=d4f9559d79a84d55516bffca073eab302855a946;p=numerical-analysis.git

Use the 2-norm instead of the infty-norm for the fixed point error ratios.
---

diff --git a/src/Roots/Simple.hs b/src/Roots/Simple.hs
index 3237d60..f9b36fa 100644
--- a/src/Roots/Simple.hs
+++ b/src/Roots/Simple.hs
@@ -260,6 +260,6 @@ fixed_point_error_ratios f x0 x_star p =
   zipWith (/) en_plus_one en_exp
   where
     xn = F.fixed_point_iterations f x0
-    en = map (\x -> norm (x_star - x)) xn
+    en = map (\x -> norm_2 (x_star - x)) xn
     en_plus_one = tail en
     en_exp = map (^p) en