trellis.graphic in for-loop
Trellis graphics need to be print()-ed for them to show on the device. I think if you wrap your call to barchart() with print(), it should work as you expect. -roger _______________________________ UCLA Department of Statistics rpeng at stat.ucla.edu http://www.stat.ucla.edu/~rpeng
On Fri, 4 Apr 2003, Alexander.Herr at csiro.au wrote:
Hi list,
I am unsuccessfully trying to produce a serious of trellis barcharts from
within a for-loop. The barcharts work outside the loop. What am I missing?
Example attached.
Thanks Herry
#XXXXXXXXXXXXXXXXXXXXXX
trellis.device(bg="white")
trellis.par.get("fontsize")->fontsize
fontsize$default<-16
trellis.par.set("fontsize",fontsize)
a<-c(1,2,4,5,4,3,3,3)
b<-c(2,5,1,1,1,3,3,3)
c<-c(3,5,1,2,2,5,5,5)
as.data.frame(cbind(a,b,c))->q21
varnames<-colnames(q21)
i<-9999
for (i in 1:3) {
round(table(q21[,i])/sum(table(q21[,i])),3)*100->z1
as.data.frame.table(table(q21[,i]))->z1
round(z1[,2]/sum(z1[,2]),3)*100->z1[,2]
colnames(z1)<-c(varnames[i],"y")
xnames<-levels(z1[,1])
paste(xnames[1]," - low",sep="")->xnames[1]
paste(xnames[length(xnames)]," - high",sep="")->xnames[length(xnames)]
z1[,1]<-xnames
as.factor(z1[,1])->z1[,1]
barchart(
horizontal=FALSE,
z1[,2]~z1[,1],
ylab=list("% frequency",cex=1.5),
main=list(varnames[i],cex=1.25),
scales=list(1,cex=1.5), col="#ffd18f",
sub=list("Rating",cex=1.25)
)
filename<-paste("test",i,"_q21k.jpg",sep="")
#dev.print(jpeg, filename , width=1000, height=1000, quality=100,
bg="white", pointsize=20)
}
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