I think you have successfully passed the "xlim" and "ylim" into the
function pairs1. Compare the two graphs produced by the codes you
provided, you can find the xlim and ylim in the second graph have been
reset to the assigned value. It seems that the program halted in
producing the second plot after adding xlim and ylim. According to the
error message, the two added parameters were not used in lower.panel, or
the customized function f.xy.
On 2010-9-1 2:26, Shi, Tao wrote:
Hi list,
I have a function which basically is a wrapper of pairs with some useful panel
functions. However, I'm having trouble to pass the "xlim" and "ylim" into the
function so the x and y axes are in the same scale and 45 degree lines are
exactly diagonal. I've looked at some old posts, they didn't help much. I
think this is b/c I have multiple panel functions. Help!
Thanks!
...Tao
pairs1<- function(x, ...) {
f.xy<- function(x, y, ...) {
points(x, y, ...)
abline(0, 1, col = 2)
}
panel.cor<- function(x, y, digits=2, prefix="", cex.cor) {
usr<- par("usr"); on.exit(par(usr))
par(usr = c(0, 1, 0, 1))
r<- abs(cor(x, y, method="p", use="pairwise.complete.obs"))
txt<- format(c(r, 0.123456789), digits=digits)[1]
txt<- paste(prefix, txt, sep="")
if(missing(cex.cor)) cex<- 0.8/strwidth(txt)
text(0.5, 0.5, txt, cex = cex * r)
}
panel.hist<- function(x, ...) {
usr<- par("usr"); on.exit(par(usr))
par(usr = c(usr[1:2], 0, 1.5) )
h<- hist(x, plot = FALSE)
breaks<- h$breaks; nB<- length(breaks)
y<- h$counts; y<- y/max(y)
rect(breaks[-nB], 0, breaks[-1], y, col="cyan", ...)
}
pairs(x, lower.panel=f.xy, upper.panel=panel.cor, diag.panel=panel.hist,
...)
}
x<- rnorm(100, sd=0.2)
x<- cbind(x=x-0.1, y=x+0.1)
pairs1(x)
pairs1(x, xlim=c(-1,1), ylim=c(-1,1))
Error in lower.panel(...) :
unused argument(s) (xlim = c(-1, 1), ylim = c(-1, 1))
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and provide commented, minimal, self-contained, reproducible code.
