Hello,
Try this way (not sure if it's the best way, but it works):
boxplot(x[,i],
main=substitute(expression(paste(a," ",italic(b),"
",c)),list(a=mainlabel1,b=predictor[i],c=mainlabel2)),
ylab=paste(ylabel),cex.lab=cexalabel,cex.main=cexmlabel,cex.axis=1.5)
Best,
Miguel
On Mon, Mar 8, 2010 at 2:27 PM, Bernd Panassiti <bernd.panass...@rivm.nl>wrote:
> Dear R users,
>
> in the example below the name of the genus will be displayed in the main
> titles using the variable predictor[i] and paste.
> I would like to have the genus name in italic. However all my attempts
> using expression and substitute failed.
> Does anybody know a solution?
> Thanks a lot in advance. bernd
>
>
> Acrobeles <-c(65.1,0.0,0.0,0.0,0.0,0.0)
> Acrobeloides <-c(0.0,9.8,76.7,51.1,93.9,43.9)
> Alaimus <-c(0.0,4.9,0.0,0.0,0.0,6.3)
> Aphelenchoides <-c(126.5,29.3,76.7,134.1,176.7,87.9)
>
> x<-data.frame(Acrobeles,Acrobeloides,Alaimus,Aphelenchoides)
>
> predictor <- colnames(x)
> ylabel <-"Numerical abundance"
> mainlabel1 <-"Boxplot for"
> mainlabel2 <-"sp."
> cexalabel <-1.8 # axis label
> cexmlabel <-1.6 # main label
>
> par(oma=c(6,6,3,3),mar = c(6, 4, 4, 2) + 0.1,mfrow=c(2,2))
>
> for (i in 1:ncol(x)){
>
> boxplot(x[,i],
>
> main=paste(mainlabel,predictor[i],mainlabel2),ylab=paste(ylabel),cex.lab=cexalabel,cex.main=cexmlabel,cex.axis=1.5)
> }
>
>
>
> ---------------------------------------------------------------------------
>
> Bernd Panassiti
>
> National Institute of Public Health & the Environment (RIVM)
> Laboratory for Ecological Risk Assessment (LER)
> P.O. Box 1
> 3720 BA Bilthoven
> The Netherlands
> e-mail: bernd.panass...@rivm.nl
> tel. +31 30 274 3647
>
> Radboud University Nijmegen
> Department of Environmental Science
> b.panass...@science.ru.nl
>
>
>
> Disclaimer RIVM
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>
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