[R] resolution of windows metafiles

[Prof Brian D Ripley]

On Fri, 15 Dec 2000 Setzer.Woodrow at epamail.epa.gov wrote:

> I am having trouble getting smooth-appearing curves in figures produced as
> windows metafiles using R (R-1.1.1 on Windows 98).  When I import them into
> a word processor (either MS Word 97, or WordPerfect 9.0), the figures
> appear only slightly bumpy on screen, but when printed, there is a clear
> jaggedness reminiscent of aliasing.  Is there a fix for this (if the answer
> is "upgrade to 1.2", I'll be doing that as soon as binaries for Windows are
> available, anyway)? Maybe metafiles have a coarse underlying resolution?

They do, no fix as yet.

> 
> The following code produces the problem (along with a postscript plot just
> to show that a smooth representation is possible):
> 
> # PlotTest.R
> # 12/15/2000
> #
> # Demonstrate some curiosities with windows metafiles
> xvals <- seq(0,1,length=101)
> yvals <- xvals^3
> win.metafile(file="test.wmf",width=4,height=3.5,
>            pointsize=12)
> plot(xvals,yvals,type="l")
> dev.off()
> 
> postscript(file="test.eps",horizontal=FALSE,width=4,height=3.5,
>          pointsize=12)
> plot(xvals,yvals,type="l")
> dev.off()
> 
> windows(width=4,height=3.5,pointsize=12)
> plot(xvals,yvals,type="l")
> dev.copy(win.metafile,file="test2.wmf",width=4,height=3.5,pointsize=12)
> dev.off()
> 
> 
> 
> R. Woodrow Setzer, Jr.                                            Phone:
> (919) 541-0128
> Experimental Toxicology Division                       Fax:  (919) 541-5394
> Pharmacokinetics Branch
> NHEERL MD-74; US EPA; RTP, NC 27711
> 
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-- 
Brian D. Ripley,                  ripley at 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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