[R] numbers on barplot

[Nutter, Benjamin]

The only thing you're missing is the midpoints of the bars.  Since you
specified

> Graph <- barplot(dat$Average)

You can get the midpoints from the Graph object.  So to put the number
on top of each bar you might use something like:

> text(Graph, dat$Average, dat$Average)


-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Mohsen Jafarikia
Sent: Monday, July 27, 2009 10:02 AM
To: R-help at stat.math.ethz.ch
Subject: [R] numbers on barplot

Hello all,
I have this simple barplot code:

ifn <- "id.dat"
dat <- read.table(ifn)
ofn <- "id.png"

bitmap(ofn, type = "png256", width = 30, height = 30, pointsize = 30, bg
=
"white",res=50)
par(mar=c(5, 5, 3, 2),lwd=5)
par(cex.main=1.6,cex.lab=1.6,cex.axis=1.6)

names(dat)<-c("NumberOfPeople","Average")
Graph<-barplot(dat$Average)
dev.off()

and here is the data (id.dat):

15    0.08
 6    0.09
 7    0.37

I want to write down the ""NumberOfPeople" on top of each of the bars.
Can
anybody help me on this?

Thanks,
Mohsen

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