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changeset 8763:5ce12bca4c51

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update comments in fsolve
author Jaroslav Hajek <highegg@gmail.com>
date Mon, 16 Feb 2009 16:08:41 +0100
parents 2476ce55d4b5
children 48d213be5e0e
files scripts/ChangeLog scripts/optimization/fsolve.m
diffstat 2 files changed, 2 insertions(+), 3 deletions(-) [+]
line wrap: on
line diff
--- a/scripts/ChangeLog	Mon Feb 16 15:50:44 2009 +0100
+++ b/scripts/ChangeLog	Mon Feb 16 16:08:41 2009 +0100
@@ -2,6 +2,7 @@
 
 	* linear-algebra/expm.m: Fix invalid unscaling.
 	* help/which.m: Do not add "function" here.
+	* optimization/fsolve.m: Update comments.
 
 2009-02-16  John W. Eaton  <jwe@octave.org>
 
--- a/scripts/optimization/fsolve.m	Mon Feb 16 15:50:44 2009 +0100
+++ b/scripts/optimization/fsolve.m	Mon Feb 16 16:08:41 2009 +0100
@@ -156,11 +156,9 @@
     m = length (fvec);
     n = length (x);
 
-    ## For square and overdetermined systems, we update a (pivoted) QR
+    ## For square and overdetermined systems, we update a QR
     ## factorization of the jacobian to avoid solving a full system in each
     ## step. In this case, we pass a triangular matrix to __dogleg__.
-    ## Pivoted QR is used for slightly better robustness and invariance
-    ## w.r.t. permutations of variables.
     useqr = updating && m >= n && n > 10;
 
     if (useqr)