Extract statistics from boxplot

Question

I\'ve already tried searching but I\'ve found nothing similar. I have a dataset containing temperatures, and another dataset containing 23 tipes of terrain (categorical vari

Answer 1

From boxplot help:

Value

List with the following components:

stats
a matrix, each column contains the extreme of the lower whisker, the lower hinge, the median, the upper hinge and the extreme of the upper whisker for one group/plot. If all the inputs have the same class attribute, so will this component.

n
a vector with the number of observations in each group.

conf
a matrix where each column contains the lower and upper extremes of the notch.

out
the values of any data points which lie beyond the extremes of the whiskers.

group
a vector of the same length as out whose elements indicate to which group the outlier belongs.

names
a vector of names for the groups.

So in your case, you can get the medians of the different categories this way:

# drawing the boxplots and assigning the results to an object
bp<-boxplot(zone$tm_03 ~ ds3_utm$terr, col='chartreuse3', xlab='Terreno', ylab='Temperatura (°C)', varwidth=T)
# get the different medians, which are on the 3rd row of the stats element
bp$stats[3,]