how to add text in my boxplot? [duplicate]

Question

I have plotted box plot for my data using given command and trying to write text (p-value ) in it.

Using :

boxplot(data,ylab = prop_index[i])
text(1:2 - 0.4, data[,1]/2, paste("p-value=",p_val))

I applied "text" command but noting has appeared on image. Please tell me appropriate method to apply this command

If you give a reproducible example one could possibly help you — DatamineR
– DatamineR, Commented Jan 7, 2016 at 18:36
@PierreLafortune, not a a duplicate--that one's ggplot2, this is base-plotting — alexwhitworth
– alexwhitworth, Commented Jan 7, 2016 at 19:03
@PierreLafortune please note: you are referring ggplot package — user96368
– user96368, Commented Apr 27, 2016 at 7:05

alexwhitworth · Accepted Answer · 2016-01-07 19:06:52Z

14

x1 <- rnorm(500)
y1 <- sample(c("a", "b", "c"), 500, replace=T)
boxplot(x1 ~ y1)
text(x= 1, y= 3, labels= "some text")
text(x= 2, y= 3, labels= "more \n text")
text(x= 3, y= 3, labels= "red text", col= "red")

answered Jan 7, 2016 at 19:06

alexwhitworth

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3 Comments

eipi10 Over a year ago

You can compress, the text additions into one line with text(x= 1:3, y= 3, labels= c("some text","more \n text","red text"), col=c(NA,NA,"red")).

alexwhitworth Over a year ago

@eipi10 Good point / of course. I was just giving the example

theforestecologist Over a year ago

How do you do this if only using a single x value (i.e., no actual x value is assigned in boxplot)? In other words, if using boxplot(y)

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