Dear, I have been reading several posts but still cannot work out how to
annotate a faceted boxplot created from existing statistics using ggplot.
the dataframe is smthing like:
dep_stat
specie.sp. models min max q25 q50 q75
1 NO2 mod1 0 225.0 0.1 0.40 1.300
2 NO2 mod2 0 219.5 0.6 2.40 8.100
3 O3 mod1 0 2834.4 93.8 334.80 793.525
4 O3 mod2 0 1238.6 5.0 214.70 376.400
5 PM25 mod1 0 49948.0 123.5 438.10 1146.100
6 PM25 mod2 0 2466.1 9.2 24.55 184.300
from which I create the plot in the figure, where the bars go from min
to the 75th percentile.
ggplot(dep_stat, aes(x=models, ymin=min, ymax=q75, lower=q25,
middle=q50, upper=q75)) +
geom_boxplot(stat='identity', width=0.5) +
theme(axis.text.x = element_text(angle = 90, vjust = 0.5, hjust=1.5)) +
theme(axis.title.x = element_blank())+theme(axis.title.y =
element_blank()) +
facet_wrap(~specie.sp., nrow=1, scales="free")
I'm trying to add (as text) at the top of each bar the maximum value,
but the annotate command doesn't do the job right:
annotate('text', x=rep(seq(1:length(models)),3), y=q75+0.5,
label=as.character(max), color="red", angle = 90, cex=5).
In this way three values text get added to each column...I have also
tried with geom_text and grobTree, without success.
thanks for your help.
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