[FORGED] About error bars on barplots
On 18/06/17 12:10, lily li wrote:
Hi R users,
I have a question about adding uncertainty bars to stacked bar plots.
DF:
year A B C Amin Amax Bmin Bmax Cmin Cmax
2009 40 45 15 30 61 23 56 14 17
2010 36 41 23 26 54 22 51 22 24
I use the code below:
DF.refm = melt(subset(DF[,c(1:4)]),id.vars='year',variable_name='Legend')
fig1 = ggplot(data=DF.refm, aes(x=year,y=value,fill=Legend))+
geom_bar(stat='identity',size=.5)+ theme_bw()+ xlab('Year')+
ylab('Percent (%)')
print(fig1)
But I don't know how to change it a little bit. For example, how to add the
error bars on the plot, as is shown in the figure below? The error bar for
variable A ranges from Amin to Amax, the same applies to variables B and C.
Thanks for your help.
Your figure did not come through, at least not to me. You are probably doing something fancy, and the mailing list software stripped out the figure. *Do* learn to keep things simple. _Attach_ figures as *.pdf files, for instance. That being said, to answer your question, my advice (and that of many others) is: DON'T. Error bars on boxplots (such plots are sometimes known as "dynamite plots" or "detonator plots") are considered by the cognoscenti to be abominations. cheers, Rolf
Technical Editor ANZJS Department of Statistics University of Auckland Phone: +64-9-373-7599 ext. 88276