X-Git-Url: http://gitweb.michael.orlitzky.com/?p=octave.git;a=blobdiff_plain;f=optimization%2Fpreconditioned_conjugate_gradient_method.m;h=e2f841aefea06ec92e8bb1e8dbe85eb5f2b65747;hp=dec2eeed97418094671d0db34e327e1351820415;hb=92116b34e755b3ef5de14a1777676bc09180f007;hpb=62955524e317c9b63006ca41da8e58647d15f632

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.