diff NEWS @ 25738:8cdaef4c6d44

NEWS: Announce changes to default fsolve options. * NEWS: Announce changes to default fsolve options.
author Rik <rik@octave.org>
date Fri, 03 Aug 2018 14:00:17 -0700
parents c7095a755185
children 8eec0403a370
line wrap: on
line diff
--- a/NEWS	Fri Aug 03 09:03:47 2018 -0700
+++ b/NEWS	Fri Aug 03 14:00:17 2018 -0700
@@ -18,6 +18,20 @@
       Octave 5.0 : strncmp ("abc", "abc", 100) => true
       Previously : strncmp ("abc", "abc", 100) => false
 
+ ** The fsolve function has been tweaked to use larger step sizes when
+    calculating the Jacobian of a function with finite differences.
+    This leads to faster convergence.  The default solver options have
+    also changed to be Matlab compatible.  This *may* result in existing
+    code producing different results.
+
+          Option     |  New Default   |  Old Default
+      ------------------------------------------------
+        FinDiffType  |   "forward"    |   "central"
+        MaxFunEvals  | 100*length(x0) |     Inf
+        TolFun       |     1e-6       |     1e-7
+        TolX         |     1e-6       |     1e-7
+        Updating     |     "off"      |     "on"
+
  ** Figure graphic objects have a new property "Number" which is
     read-only and will return the handle (number) of the figure.
     However, if the property "IntegerHandle" has been set to "off" then