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!
>
> [[alternative HTML version deleted]]
>
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