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Re: hairlines in graphics

To: Dennis Fisher <fisher@plessthan.com>
Subject: Re: hairlines in graphics
From: Prof Brian Ripley <ripley@stats.ox.ac.uk>
Date: Mon, 22 Jan 2007 08:01:23 +0000 (GMT)
Cc: s-news@lists.biostat.wustl.edu
In-reply-to: <982788A7-46B4-41CE-AC6B-82528C7B6F7A@plessthan.com>
References: <20070120112004.A9A94126C62@smtp.biostat.wustl.edu> <982788A7-46B4-41CE-AC6B-82528C7B6F7A@plessthan.com>
The help for par in my version of S-PLUS says

  lwd:
  line width, device dependent. Width 1 is the standard width for the
  device

and you have not told us the device you are using.

In R it says

  The line width, a positive number, defaulting to 1. The interpretation
  is device-specific, and some devices do not implement line widths
  less than  one.

so the same comment applies. R does say on the help for each device what the interpretation is, though. E.g., for the X11 device it says

     Line widths as controlled by 'par(lwd=)' are in multiples of the
     pixel size, and multiples < 1 are silently converted to 1.

Just which devices are you comparing?

On Sun, 21 Jan 2007, Dennis Fisher wrote:

Colleagues

I am running Splus version 6.0 on a Linux box (RedHat 9). In certain graphics that I create, I display many lines. In R, setting lwd to a small number (e.g, 0.2) allows for thin lines. However, with Splus, the lwd command (my version, my OS) appears to not support lines thinner than 1. Is this a function of Splus, version, or OS? If the solution is to purchase a newer version of Splus, I will need to do so. Thanks.

Dennis

Dennis Fisher MD
P < (The "P Less Than" Company)
Phone: 1-866-PLessThan (1-866-753-7784)
Fax: 1-415-564-2220
www.PLessThan.com




--
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 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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