Bug in Latest ggplot2 release?

[Lorenzo Isella]

Dear All,
In rerunning some old scripts of mine on some datasets, I am getting
some errors which I did not use to have in the past.
As far as I can tell, the errors are concerned with ggplot2 and the only
thing I have done so far has been to upgrade to its latest version
fetched from CRAN (in case it matters, I am running Ubuntu 10.04, AMD64
architecture).
Please consider the snippet at the end of the email, which returns this
error

Error in get("make_aesthetics", env = x, inherits = TRUE)(x, ...) :
could not find function "empty"

Any idea about what is going wrong?
Cheers

Lorenzo

##########################################################################################

library(ggplot2)

fn
<-paste("http://dl.dropbox.com/u/5685598/many_tags_contact_duration_distr2_1_.dat")

contact<-read.table(fn,header=FALSE)
contact<-as.matrix(contact)

## my_dframe <- seq(length(contact))
## my_dframe[] <- contact
my_dframe <- data.frame(contact)
names(my_dframe) <- "contact_data"

#print("OK here1")

gpl <- ggplot(my_dframe,aes(x=contact_data) )+
geom_histogram(binwidth=0.3, colour="darkgreen", fill="white")+

scale_x_continuous(trans = "log10", limits=c(10,1e4))+

xlab("Contact Duration (sec)")+
ylab("Number of one-to-many Contacts")+
opts(axis.title.x = theme_text(size = 20))+
opts(axis.title.y = theme_text(size = 20, angle=90))+
opts(axis.text.x = theme_text(size=15, colour="gray",vjust=1))+
opts(axis.text.y = theme_text(size=15, colour="gray", hjust=1))

fn <- paste("histogram_contact_duration_many_tags_ggplot2_.pdf")

pdf(fn)
print(gpl)
dev.off()

[Hadley Wickham]

You also need to update plyr.
Hadley

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[Lorenzo Isella]

Done.
Now everything is going fine again.
Cheers

Lorenzo