Can you help me get the values of the variables from stat_boxplot in ggplot2

[ramuigib]

I wish to label the different parts of the boxplot drawn by geom_boxplot()

I see that the variables ymin, lower, middle etc are computed by stat_boxplot() but I am not able to access them to label the boxplot.

Can you help me?

[scottyd22]

Welcome! The solution below is one approach to adding labels to your boxplot.

Labelling of median, upper and lower whiskers in Boxplots

The line geom_text(aes(label=median(marks))) is inheriting the x and y from data, so the calculated median is printed for each (x,y) in the tibble. One way to handle this is to create a second tibble that provides only those values in the boxplot you want to label. Using the quantile() function, we can create the following: data_labels = tibble(student = 'level-1', values = quantile(data$marks) ) which produces... [image] Now, replacing this in your ggplot chain and specifying data = data_labels in geom_text(), ggplot(data,aes(student,marks))+ geom_boxplot(fill="orange")+ geom_text(data = data_labels, aes(student, values, label = values)) w…

[ramuigib]

Thank you. I already know this approach. What I wanted to know is How to access the variables computed by stat_boxplot() to label the boxplot because I don't know if they are also using the quantile function or summary function.

with regards
Rama

[ramuigib]

I found a way by searching and searching.

So the trick is to get the data from geom_boxplot into an object and then using ggplot_build()

It works!

with regards
Rama