[R] Cropped graph using lattice

[Paul Murrell]

Hi

Susan Durham wrote:
> I'm fitting data from a mixture experiment, and I'd like to present
> the results in a ternary graph with contours.  I found this code by
> Walmes Zeviani
> 
> http://n4.nabble.com/Triangular-filled-contour-plot-td1557386.html
> 
> which is just what I want--except I would like the axis titles and
> labels to be proportionately larger than the ternary graph itself,
> for legibility in publication.  When I increase the cex, the figure
> is cropped.  I've spent a lot of time in the help files and Murrell's
> book, and searched archives trying to sort this out, with no success.
> 
> 
> I am running the code included below with R 2.10.1 on Windows XP
> Professional.

This may just be a matter of expanding the axis limits, e.g., ... ?

levelplot(yhat~base*high, trian, aspect="iso",
           ## HERE
           xlim=c(-0.5,1.5), ylim=c(-0.5,1.5),
	  ## HERE
           xlab=NULL, ylab=NULL, contour=TRUE,
           colorkey=list(space="bottom", labels=list(col=1, cex=1.3)),
           par.settings=list(axis.line=list(col=NA),
                             axis.text=list(col=NA)),
           panel=function(..., at, contour=TRUE, labels=NULL){
             panel.levelplot(..., at=at, contour=contour, #labels=labels,
                             lty=3, lwd=0.5, col=1)
           })

Paul

> Thank you, in advance, for your help.
> 
> Susan ~~~ Susan Durham Ecology Center Utah State University
> 
> 
> library(grid) library(lattice)
> 
> paint <- data.frame(mono=c(17.5, 10, 15, 25, 5, 5, 11.25, 5, 18.13,
> 8.13, 25, 15, 10, 5), cross=c(32.5, 40, 25, 25, 25, 32.5, 32.5, 40,
> 28.75, 28.75, 25, 25, 40, 25), resin=c(50, 50, 60, 50, 70, 62.5,
> 56.25, 55, 53.13, 63.13, 50, 60, 50, 70), hardness=c(29, 26, 17, 28,
> 35, 31, 21, 20, 29, 25, 19, 14, 30, 23))
> 
> pseudo <- with(paint, data.frame(mono=(mono-5)/(25-5),
> resin=(resin-50)/(70-50))) pseudo$cross <- with(pseudo, 1-mono-resin)
>  pseudo$hardness <- paint$hardness
> 
> m1 <- lm(hardness~(mono+cross+resin)^2-mono, data=pseudo)
> 
> trian <- expand.grid(base=seq(0,1,l=100*2),
> high=seq(0,sin(pi/3),l=87*2)) trian <- subset(trian,
> (base*sin(pi/3)*2)>high) trian <- subset(trian,
> ((1-base)*sin(pi/3)*2)>high)
> 
> new2 <- data.frame(cross=trian$high*2/sqrt(3)) new2$resin <-
> trian$base-trian$high/sqrt(3) new2$mono <- 1-new2$resin-new2$cross
> 
> trian$yhat <- predict(m1, newdata=new2)
> 
> grade.trellis <- function(from=0.2, to=0.8, step=0.2, col=1, lty=2,
> lwd=0.5){ x1 <- seq(from, to, step) x2 <- x1/2 y2 <- x1*sqrt(3)/2 x3
> <- (1-x1)*0.5+x1 y3 <- sqrt(3)/2-x1*sqrt(3)/2 panel.segments(x1, 0,
> x2, y2, col=col, lty=lty, lwd=lwd) panel.text(x1, 0, label=x1, pos=1,
> cex=1.3) panel.segments(x1, 0, x3, y3, col=col, lty=lty, lwd=lwd) 
> panel.text(x2, y2, label=rev(x1), pos=2, cex=1.3) panel.segments(x2,
> y2, 1-x2, y2, col=col, lty=lty, lwd=lwd) panel.text(x3, y3,
> label=rev(x1), pos=4, cex=1.3) }
> 
> levelplot(yhat~base*high, trian, aspect="iso", xlim=c(-0.1,1.1),
> ylim=c(-0.1,0.96), xlab=NULL, ylab=NULL, contour=TRUE, 
> colorkey=list(space="bottom", labels=list(col=1, cex=1.3)), 
> par.settings=list(axis.line=list(col=NA), axis.text=list(col=NA)), 
> panel=function(..., at, contour=TRUE, labels=NULL){ 
> panel.levelplot(..., at=at, contour=contour, #labels=labels, lty=3,
> lwd=0.5, col=1) }) trellis.focus("panel", 1, 1, highlight=FALSE) 
> panel.segments(c(0,0,0.5), c(0,0,sqrt(3)/2), c(1,1/2,1),
> c(0,sqrt(3)/2,0)) grade.trellis() panel.text(0, 0, label="mono",
> pos=2, cex=1.3) panel.text(1/2, sqrt(3)/2, label="cross", pos=3,
> cex=1.3) panel.text(1, 0, label="resin", pos=4, cex=1.3) 
> trellis.unfocus()
> 
> ______________________________________________ R-help at r-project.org
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-- 
Dr Paul Murrell
Department of Statistics
The University of Auckland
Private Bag 92019
Auckland
New Zealand
64 9 3737599 x85392
paul at stat.auckland.ac.nz
http://www.stat.auckland.ac.nz/~paul/