From Prof Brian Ripley <ripley@stats.ox.ac.uk>  Mon May 22 09:45:35 2000
From: Prof Brian Ripley <ripley@stats.ox.ac.uk> (Prof Brian Ripley)
Date: Mon, 22 May 2000 09:45:35 +0100 (BST)
Subject: [Rd] RE:bug 548 graphics '*' (PR#549)
Message-ID: <200005220845.JAA11255@toucan.stats.ox.ac.uk>


> From: acuster@nature.berkeley.edu
> Date: Mon, 22 May 2000 00:13:41 +0200 (MET DST)
> To: r-devel@stat.math.ethz.ch
> Subject: [Rd] RE:bug 548 graphics '*' (PR#549)
> CC: R-bugs@biostat.ku.dk
> X-Loop: R-bugs@biostat.ku.dk
> X-Keywords: 
> 
> Full_Name: Adrian Custer
> Version: 1.0.1
> OS: gnu-linux (mandrake 7.1beta)
> Submission from: (NULL) (128.32.251.234)
> 
> 
> This is an update to bug report 548.

Please put PR#548 in the subject line for a follow-up. And *please*
mention critical facts like which graphics device you were using.

> The bug had two parts on my system:
> 1) the gnome-interface puts the "*" mark in the wrong place. It could be
> superscript 
> or something else. From the Docs the gnome-interface claimed just to 
re-display
> the 
> base R but it is obviously doing something more and breaking the display.

Can you tell us please where you read that in the docs, so we can
correct it?  It is a completely separate graphics device, to be called
gtk() from 1.1.0 (and the X11-based x11() will also be available).


> 1) the X11() interface. I can no longer reproduce the bug. Yesterday, the mark
> was 
> off everytime by a pixel today it is fine. 

*one* pixel?  I don't think you can expect one-pixel accuracy, not
least as where the centre of `*' is in the font used on my screen is
unclear to less than about half pixel.  Accuracy to one pixel seems fine
on a screen device, provided it is consistent.  You can expect greatest
accuracy on the hardcopy devices, where it may matter.

> I have contacted the person in charge of the gnome-Interface port so this 
should
> be 
> considered a bug of that unless I can start reproducing the X11() offset.

If you mean Lyndon Drake, he has moved and as far as we know is no
longer working on R. 

-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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[Rd] RE:bug 548 graphics '*' (PR#549)
Prof Brian Ripley