From mboxrd@z Thu Jan  1 00:00:00 1970
X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/9752
Path: main.gmane.org!not-for-mail
From: Jens-Uwe Morawski <morawski@gmx.net>
Newsgroups: gmane.comp.tex.context
Subject: Re: MP graph auto axes
Date: Thu, 7 Nov 2002 14:36:50 +0100
Sender: ntg-context-admin@ref.ntg.nl
Message-ID: <20021107143650.307f1c48.morawski@gmx.net>
References: <20021106191356.7160@news.comp.lancs.ac.uk>
	<5.1.0.14.1.20021107095401.03198d70@server-1>
Reply-To: ntg-context@ref.ntg.nl
NNTP-Posting-Host: main.gmane.org
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
X-Trace: main.gmane.org 1036680896 18175 80.91.224.249 (7 Nov 2002 14:54:56 GMT)
X-Complaints-To: usenet@main.gmane.org
NNTP-Posting-Date: Thu, 7 Nov 2002 14:54:56 +0000 (UTC)
Return-path: <ntg-context-admin@ref.vet.uu.nl>
Original-Received: from ref.vet.uu.nl ([131.211.172.13] helo=ref.ntg.nl)
	by main.gmane.org with esmtp (Exim 3.35 #1 (Debian))
	id 189npX-0003d8-00
	for <gctc-ntg-context-518@gmane.org>; Thu, 07 Nov 2002 15:40:23 +0100
Original-Received: from ref.ntg.nl (localhost.localdomain [127.0.0.1])
	by ref.ntg.nl (Postfix) with ESMTP
	id 3F63F10AF4; Thu,  7 Nov 2002 15:41:51 +0100 (MET)
Original-Received: from mail.gmx.net (sproxy.gmx.de [213.165.64.20])
	by ref.ntg.nl (Postfix) with SMTP id A2F7710AE6
	for <ntg-context@ref.ntg.nl>; Thu,  7 Nov 2002 15:40:26 +0100 (MET)
Original-Received: (qmail 11984 invoked by uid 0); 7 Nov 2002 14:40:25 -0000
Original-Received: from port1603.fra.ginko.net (HELO melior.localdomain) (212.202.68.79)
  by mail.gmx.net (mp018-rz3) with SMTP; 7 Nov 2002 14:40:25 -0000
Original-To: ntg-context@ref.ntg.nl
In-Reply-To: <5.1.0.14.1.20021107095401.03198d70@server-1>
X-Mailer: Sylpheed version 0.8.5 (GTK+ 1.2.10; i386-redhat-linux)
Errors-To: ntg-context-admin@ref.ntg.nl
X-BeenThere: ntg-context@ref.ntg.nl
X-Mailman-Version: 2.0.13
Precedence: bulk
List-Help: <mailto:ntg-context-request@ref.ntg.nl?subject=help>
List-Post: <mailto:ntg-context@ref.ntg.nl>
List-Subscribe: <http://ref.ntg.nl/mailman/listinfo/ntg-context>,
	<mailto:ntg-context-request@ref.ntg.nl?subject=subscribe>
List-Id: mailing list for ConTeXt users <ntg-context.ref.ntg.nl>
List-Unsubscribe: <http://ref.ntg.nl/mailman/listinfo/ntg-context>,
	<mailto:ntg-context-request@ref.ntg.nl?subject=unsubscribe>
List-Archive: <http://ref.ntg.nl/pipermail/ntg-context/>
Xref: main.gmane.org gmane.comp.tex.context:9752
X-Report-Spam: http://spam.gmane.org/gmane.comp.tex.context:9752

On Thu, 07 Nov 2002 09:55:29 +0100
Hans Hagen <pragma@wxs.nl> wrote:

 
> looks like some problem in interpreting the big numbers, (mp can handle 
> only numbers <4000 and some string trickery is used in the graph package); 
> does this also happens in stand alone graphics or is it context specific?
> 

no, the problem is not specific to ConTeXt. The problem is in the
Gipick_ macro. There a logarithm is calculated:
n = 1 for i=1 upto
	mlog(xpart Gmhh_-xpart Gmll_)/Mten - mlog m/(Mten-epsilon):
      *10 endfor;

The problem is that the argument of mlog becomes <0, thus it is not
defined. Here is the error message for the 3rd graph:

! Logarithm of -1385.99995 has been replaced by 0.
Gipick_->...i=1upto.mlog(xpart.Gmhh_-xpart.Gmll_)/
                                                  Mten-mlog.m/(Mten-epsilon)...

auto->...fi.else:hide(Gme_:=Gesame_)Gigen_(Gipick_
                                                  ,Gcma_.Gpack_(m,Gme_))fi
<to be read again>

I spend some time yesterday, but the package is a little tricky
and uses some not intuitive variable names. so...

Jens