[R] Problem with levelplot() in a loop

2013-02-20 Thread Nikhil Joshi 
Dear R users,
I am trying to print heatmaps in a loop (with a pause).  Idea is to
visualize changing correlations over time and for testing I wrote this
simple (reproducible) code below.
My problem is that levelplot() does not produce any output when I run the
code (though heatmap does).  Ideally I would like to use levelplot() as it
produces a neat index on the side indicating the color and the correlation
value that it corresponds to while heatmap does not.  Any pointers as to
how I can make levelplot() produce output in the loop or get heatmap to
procude a nice index like levelplot() does?
ps- To see the output with heatmap in a loop, just uncomment the heatmap()
line and comment out the levelplot() line

col.l - colorRampPalette(c('blue', 'green', 'yellow', 'red'))(30)
for (i in 1:10)
{
  randmat - cbind(rnorm(100),rnorm(100),rnorm(100),rnorm(100),rnorm(100))
  colnames(randmat) - c('A','B','C','D','E')
  cormat - cor(randmat)
  levelplot(cormat,xlab=NULL,ylab=NULL,main='Correlation Heat
Map',col.regions=col.l)
#  heatmap(cormat,col=col.l,Rowv=NA, Colv=NA,main=paste(Plot:,i,sep=''))
  Sys.sleep(1)
}

Thanks much in advance!

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Re: [R] Problem with levelplot() in a loop

2013-02-20 Thread John Kane 
I think you need a print command in there

John Kane
Kingston ON Canada


 -Original Message-
 From: nikhiljo...@gmail.com
 Sent: Wed, 20 Feb 2013 16:38:56 -0500
 To: r-help@r-project.org
 Subject: [R] Problem with levelplot() in a loop
 
 Dear R users,
 I am trying to print heatmaps in a loop (with a pause).  Idea is to
 visualize changing correlations over time and for testing I wrote this
 simple (reproducible) code below.
 My problem is that levelplot() does not produce any output when I run the
 code (though heatmap does).  Ideally I would like to use levelplot() as
 it
 produces a neat index on the side indicating the color and the
 correlation
 value that it corresponds to while heatmap does not.  Any pointers as to
 how I can make levelplot() produce output in the loop or get heatmap to
 procude a nice index like levelplot() does?
 ps- To see the output with heatmap in a loop, just uncomment the
 heatmap()
 line and comment out the levelplot() line
 
 col.l - colorRampPalette(c('blue', 'green', 'yellow', 'red'))(30)
 for (i in 1:10)
 {
   randmat -
 cbind(rnorm(100),rnorm(100),rnorm(100),rnorm(100),rnorm(100))
   colnames(randmat) - c('A','B','C','D','E')
   cormat - cor(randmat)
   levelplot(cormat,xlab=NULL,ylab=NULL,main='Correlation Heat
 Map',col.regions=col.l)
 #  heatmap(cormat,col=col.l,Rowv=NA,
 Colv=NA,main=paste(Plot:,i,sep=''))
   Sys.sleep(1)
 }
 
 Thanks much in advance!
 
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 __
 R-help@r-project.org mailing list
 https://stat.ethz.ch/mailman/listinfo/r-help
 PLEASE do read the posting guide
 http://www.R-project.org/posting-guide.html
 and provide commented, minimal, self-contained, reproducible code.


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__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.