Plotting Histogram using histogram() and for loop and I want to save the histogram individually ... HELP

here is the codes that i tried.....

png(paste("hist",i,".png",sep="") 

+ library(lattice)
Error: unexpected symbol in:
"png(paste("hist",i,".png",sep="") 
library"

for(i in 8:153){ 

+ histogram(~ data[,i] | data[,2],
data=data,ylab="Frequency",xlim=c(1,5),xlab="Score",ylim=c(0,100)))
Error: unexpected ')' in:
"for(i in 8:153){ 
histogram(~ data[,i] | data[,2],
data=data,ylab="Frequency",xlim=c(1,5),xlab="Score",ylim=c(0,100)))"

}

Error: unexpected '}' in "}"

dev.off()

Error in dev.off() : cannot shut down device 1 (the null device)

still doesnt work ...


Karl Ove Hufthammer wrote:

On Thu, 12 Nov 2009 19:10:52 -0800 (PST) ychu066 <ychu066
@aucklanduni.ac.nz> wrote:

And I also want to save each histogram in each separate pdf file using
the
following codes ?.
png("hist.png[i]")
dev.off()

Try png(paste("hist",i,".png",sep="") instead.

-- 
Karl Ove Hufthammer

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