Label bars in a faceted bar plot in ggplot2

Dear Harsh,

Have a look at geom_text()

ggplot(df, aes(x = Models, y = Values)) + geom_bar() + geom_text(aes(y =
Values + 1, label = round(Values, 2))) + facet_grid(.~Type)

HTH,

Thierry


------------------------------------------------------------------------
----
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature
and Forest
Cel biometrie, methodologie en kwaliteitszorg / Section biometrics,
methodology and quality assurance
Gaverstraat 4
9500 Geraardsbergen
Belgium
tel. + 32 54/436 185
Thierry.Onkelinx at inbo.be
www.inbo.be

To call in the statistician after the experiment is done may be no more
than asking him to perform a post-mortem examination: he may be able to
say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of
data.
~ John Tukey

-----Oorspronkelijk bericht-----
Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
Namens Harsh
Verzonden: woensdag 11 februari 2009 13:49
Aan: r-help at r-project.org
Onderwerp: [R] Label bars in a faceted bar plot in ggplot2

Hi List,
I am running R 2.8.0 on a Windows XP machine, running ggplot2 version
0.8.1

I want to label the bars in a faceted grid barplot. Reproducible R
code is given below:


#### reproducible facet barplot #####

library(ggplot2)

# Dataset from which to create the barplot
ml <- rep(1:10,2)
vals <- rnorm(20,mean = 10, sd=1)
type <- c(rep("MAPE",10),rep("AIC",10))
df<- data.frame(Models = as.factor(ml),Values=vals,Type=type)

# create lables to put on the bars
mapevals <- rnorm(10,1,1) * 10
aicvals<- rnorm(10,1,1) * 1000

## create plot
p<- NULL
p<- qplot(x=Models,y=Values,data=df,geom="bar")

# facet grid
print(p + facet_grid(.~Type))
################### END R CODE #########################

The above R code brings to the point where I see two grids based on
MAPE and AIC.

I want to put mapevals and aicvals on the bars of the two grids that
are created for MAPE and AIC respectively.

Thank you for your time and patience.

Regards

Harsh Singhal
Decision Systems,
Mu Sigma Inc.
Chicago, IL