R help - Mar 2003 - png plots

I saw in the archive a post from Mark Wilkinson (Feb 1, 2003), saying
that some of his R-generated png plots came out overlapping.

I am seeing the same thing (with R 1.6.2 on Linux i686).  My input
file generated 4 plot files.  The first two were fine, but the last 2
featured a weird overlay of the remaining graphs.  The problem is not
seen with postscript of pdf output.

-- 
Allin Cottrell
Department of Economics
Wake Forest University, NC

And your platform is?  There are two different png devices in R.

On Wed, 12 Mar 2003, Allin Cottrell wrote:
> I saw in the archive a post from Mark Wilkinson (Feb 1, 2003), saying
> that some of his R-generated png plots came out overlapping.
> 
> I am seeing the same thing (with R 1.6.2 on Linux i686).  My input
> file generated 4 plot files.  The first two were fine, but the last 2
> featured a weird overlay of the remaining graphs.  The problem is not
> seen with postscript of pdf output.
> 
> 
-- 
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 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

Allin Cottrell <cottrell at wfu.edu> writes:
> I am seeing the same thing (with R 1.6.2 on Linux i686).  My input
> file generated 4 plot files.  The first two were fine, but the last 2
> featured a weird overlay of the remaining graphs.  The problem is not
> seen with postscript of pdf output.
Please, provide us with a reproducible example, or this will remain
little more than hearsay... I mean, we'll take your word that the
effect exists, but what can we do about it?

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

<<Rplot001.png>>  <<Rplot002.png>> 
<<Rplot003.png>>  <<Rplot004.png>>

Indeed, the problem persists.   My code was using a for() loop:

##
png()
for (i in seq(1, 16, 4)) {
  par(mfrow=c(2, 2))
  
  for (gt in i:(i+3)) {
    mysep <- paste(rep('  ', i), collapse='')
    plot(density(rnorm(1000)), main=paste(i, gt, sep=mysep))

    for (j in 1:5) { 
      lines(density(rnorm(1000)), lty=4, col="gray")
    }
  }
}
dev.off()
## 

The code works fine on Windows. 
> version
         _
platform i686-pc-linux-gnu
arch     i686
os       linux-gnu
system   i686, linux-gnu
status
major    1
minor    6.2
year     2003
month    01
day      10
language R

Mark Wilkinson
Informatics Analyst
St. Jude Children's Research Hospital
Department of Pharmaceutical Sciences

The opinions expressed here are my own and do not necessarily represent
those of St. Jude Children's Research Hospital.


 -----Original Message-----
From: 	Peter Dalgaard BSA [mailto:p.dalgaard at biostat.ku.dk] 
Sent:	Wednesday, March 12, 2003 2:39 PM
To:	Allin Cottrell
Cc:	r-help at stat.math.ethz.ch
Subject:	Re: [R] png plots

Allin Cottrell <cottrell at wfu.edu> writes:
> I am seeing the same thing (with R 1.6.2 on Linux i686).  My input
> file generated 4 plot files.  The first two were fine, but the last 2
> featured a weird overlay of the remaining graphs.  The problem is not
> seen with postscript of pdf output.
Please, provide us with a reproducible example, or this will remain
little more than hearsay... I mean, we'll take your word that the
effect exists, but what can we do about it?

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

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