Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!yale!mintaka!bloom-beacon!eru!luth!d89-bfr
From: d89-bfr@sm.luth.se (d89-bfr)
Newsgroups: comp.sys.handhelds
Subject: Undocumented feature on the HP28s solver
Message-ID: <385@sigma.sm.luth.se>
Date: 15 Mar 90 10:58:32 GMT
Reply-To: <d89-bfr@sigma.sm.luth.se>
Organization: University of Lulea, Sweden
Lines: 15
UUCP-Path: {uunet,mcvax}!sunic.se!sigma.sm.luth.se!d89-bfr

Sometimes it's nice to know the sign of a function and where the
function is tested, when solving for roots. The derivate would also be
nice to know. The sign of the function, and where it is tested can be
showed. I noticed this when I slipped on my fingers. If you after
pushing [SHIFT] [var], press [ENTER], you will see two rows looking
like this

s  xxxxxxxx
s  xxxxxxxx

Where s is the sign of the function at the value xxxxxxxx. This way
you can see how the progress of the root finding. At least I didn't
know about this and I certainly haven't found it in the manuals.
   _
/Bjorn.