From: Michael Orlitzky <michael@orlitzky.com>
Date: Mon, 25 Mar 2013 22:48:14 +0000 (-0400)
Subject: Tiny refactoring in the PCGM.
X-Git-Url: https://gitweb.michael.orlitzky.com/?a=commitdiff_plain;h=92116b34e755b3ef5de14a1777676bc09180f007;p=octave.git

Tiny refactoring in the PCGM.
---

diff --git a/optimization/preconditioned_conjugate_gradient_method.m b/optimization/preconditioned_conjugate_gradient_method.m
index dec2eee..e2f841a 100644
--- a/optimization/preconditioned_conjugate_gradient_method.m
+++ b/optimization/preconditioned_conjugate_gradient_method.m
@@ -66,7 +66,8 @@ function [x, k] = preconditioned_conjugate_gradient_method(Q, ...
   %
 
   % We use this in the inner loop.
-  sqrt_n = floor(sqrt(length(x0)));
+  n = length(x0);
+  sqrt_n = floor(sqrt(n));
 
   % Set k=0 first, that way the references to xk,rk,zk,dk which
   % immediately follow correspond (semantically) to x0,r0,z0,d0.