[R] Showing time progression on (triangle) plots

[JS Walker]

Hi,

I have made some nice triangle plots showing the projected airborne, 
landborne and oceanborne fraction of anthropogenic emitted carbon dioxide 
at 10 year intervals for the next century.

Currently all ten points on my plot are identical so I can't distinguish 
between them. I would like to be able to track the trend as the century 
progresses.

How can I show the time progression on the plot (I was thinking a gradual 
colour, character type or character size change)?


Thanks for the help


Jim




The code I have used for the plot uses 'plotrix' (thanks to the Bristol 
mirror):

Fractions <-matrix(c(LF10,AF10,OF10), ncol=3)
colnames(Fractions, do.NULL = TRUE, prefix="col")
colnames(Fractions) <- c("Landborne fraction", "Airborne fraction", 
"Oceanborne fraction")
library(plotrix)
triax.plot(x=Fractions,main="Where do anthropogenic emissions 
reside?",at=seq(0.1,0.9,by=0.1),axis.labels=NULL, 
tick.labels=NULL,col.axis="black",cex.axis=1,cex.ticks=1,align.labels=TRUE,show.grid=TRUE,col.grid="gray",lty.grid=par("lty"),cc.axes=FALSE,show.legend=FALSE,label.points=FALSE,point.labels=NULL,col.symbols="2",pch=par("pch"),no.add=TRUE)


----------------------
JS Walker
jw2324 at bristol.ac.uk