CODEWITHSUNDEEP
rplotboxplot
N Brouwer
N Brouwer

Reputation: 5078

How to Increase the thickness of the box lines in an R boxplot?

How can I increase the thickness of the lines that outline "box" part of a boxplot using either the base R plot or boxplot function? That is, how do I thicken the lines of the box that defines the quantiles.

For a plot like this:

boxplot(rnorm(100,50,10), horizontal = TRUE, notch = TRUE)

I'm guessing I need to include a pars = statement like 

boxplot(rnorm(100,50,10), horizontal = TRUE, notch = TRUE, pars = ...)

EDIT: My guess regarding the use of pars = comes from a first glance at the documentation for boxplot which indicates that pars = can call "a list of (potentially many) more graphical parameters, e.g., boxwex or outpch; these are passed to bxp (if plot is true)..."

Upvotes: 7

Views: 17221

Answers (2)

Gavin Simpson
Gavin Simpson

Reputation: 174813

See the boxlwd parameter as discussed in ?bxp (linked to from ?boxplot). E.g.

boxplot(rnorm(100,50,10), horizontal = TRUE, notch = TRUE, boxlwd = 4)

Upvotes: 9

IRTFM
IRTFM

Reputation: 263342

Are you talking about the rectangle that surrounds the plot area? If so, then this can follow you plot call:

 box(lwd=5)

Upvotes: 4

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