From: Michael Orlitzky <michael@orlitzky.com>
Date: Mon, 25 Mar 2013 21:38:41 +0000 (-0400)
Subject: Remove useless abs() in the PCGM.
X-Git-Url: http://gitweb.michael.orlitzky.com/?p=octave.git;a=commitdiff_plain;h=62955524e317c9b63006ca41da8e58647d15f632;ds=sidebyside

Remove useless abs() in the PCGM.
---

diff --git a/optimization/preconditioned_conjugate_gradient_method.m b/optimization/preconditioned_conjugate_gradient_method.m
index cd88608..dec2eee 100644
--- a/optimization/preconditioned_conjugate_gradient_method.m
+++ b/optimization/preconditioned_conjugate_gradient_method.m
@@ -90,8 +90,8 @@ function [x, k] = preconditioned_conjugate_gradient_method(Q, ...
 
     % So if it's too close to zero, we replace it with something
     % comparable but non-zero.
-    if (abs(dkQdk) < eps)
-      dkQdk = sign(dkQdk)*eps;
+    if (dkQdk < eps)
+      dkQdk = eps;
     end
 
     alpha_k = rkzk/dkQdk;