I am making a barplot using barplot2 from gplots where each bar
represents a specific tree species. I have formatted the species names
on the x-axis so that the genus name is above the species name and
have then rotated the labels 45 degrees to save room. This is my code:
>columncolor<-c("grey20", "grey20", "grey20", "grey70", "grey70",
"grey70", "grey70", "grey70", "grey70")
>speciesnames<-c("Dialium\nguianensis", "Inga\nalba", "Tachigali
\nversicolor", "Brosimum\nutile", "Caryocar\ncostaricense", "Castilla
\ntunu", "Otoba\nnovagranatensis", "Pourouma\nbicolor", "Socratea
\nexorrhiza")
>barplot2(meanapAprilactivity, names.arg=speciesnames,
col=columncolor, xlab="Species", ylab="Soil acid phosphatase activity
(nmol/h/g)", ylim=c(0,1000), plot.ci=T, ci.l=apAprilminusordered,
ci.u=apAprilplusordered, cex.lab=1.5)#FinalGraphs>aPApril_Genus.pdf
>xvals<-barplot2(meanapAprilactivity, col=columncolor,
xlab="Species", ylab="Soil acid phosphatase activity (nmol/h/g)",
ylim=c(0,1000), plot.ci=T, ci.l=apAprilminusordered,
ci.u=apAprilplusordered, cex.lab=1.5)#FinalGraphs>aPApril_Genus.pdf
>text(xvals,par("usr")[3]-1, srt=45, adj=0.5,labels=speciesnames,
xpd=T)
I have a few problems/questions:
1) The middle of the species names are placed at the bottom of the
bar, such that half of the label is in the figure.
2) There is too much of a space between the genus and species name
(e.g. between Dialium and guianensis for my first species)
3) Do I use cex.axis to change the font size of the labels and cex.lab
to change the font size of xlab and ylab?
I don't understand par() well enough to know what to change. I figured
changing the numbers after "usr" might help but I don't understand
what these numbers refer to and guess and check hasn't gotten me
anywhere.
Thanks,
Adrienne Keller
Graduate Student, College of Forestry
University of Montana
adrienne.kel...@umontana.edu
(Phone) 651-485-5822
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