From p.dalgaard@biostat.ku.dk  Mon Mar 20 23:34:29 2000
From: p.dalgaard@biostat.ku.dk (Peter Dalgaard BSA)
Date: 21 Mar 2000 00:34:29 +0100
Subject: [Rd] followup to graphics bug #414
In-Reply-To: Ben Bolker's message of "Mon, 20 Mar 2000 17:20:15 -0500 (EST)"
References: <Pine.LNX.4.10.10003201645220.8643-100000@bolker.zoo.ufl.edu>
Message-ID: <x2k8ixp662.fsf@blueberry.kubism.ku.dk>

Ben Bolker <ben@zoo.ufl.edu> writes:

> I set this up so that one line (red) would clip at the bottom only, one
> line (green) would clip at the bottom and the top, and one line (black)
> wouldn't need clipping at all. In R 1.0.0 everything works fine under the
> X11 driver but under the Postscript driver, both of the clipped lines are
> wrong, but are different depending on how the clipping parameter is set.
> 
>   I haven't yet been able to track the source of this down, but I hope
> that this information helps if someone gets to it before I do.  If the
> recent fix also fixes this bug, that would be very nice.

I suspect it will. The clipping functions are broken with logged axes
on all devices which cannot do their own clipping, and since Paul made
devPS capable of clipping... 

We still need a fix for clipping for 1.0.1. I assume that the new
devPS has been changed too much to qualify as a bugfix (?) and
anyways, it is still a bug for any other device without clipping
capabilities. 

(As you may have gathered, the bug is that clipping is calculated by
linear interpolations on the original scale, which isn't going to
work...) 

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907
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[Rd] followup to graphics bug #414
Peter Dalgaard BSA