Re: [R] Controlling size of boxplot when it is added in a plot

From: Martin Maechler <maechler_at_stat.math.ethz.ch>
Date: Mon 15 Jan 2007 - 13:08:51 GMT

>>>>> "Charilaos" == Charilaos Skiadas <skiadas@hanover.edu>
>>>>> on Sat, 13 Jan 2007 23:12:00 -0500 writes:

    Charilaos> I am trying to add a boxplot to the bottom of a
    Charilaos> histogram, right between the histogram bars and
    Charilaos> the x axis. Here is the code I am using at the
    Charilaos> moment (the par line is probably not relevant for
    Charilaos> our discussion):

    Charilaos> hs <- hist(x, breaks = 20, plot = F)
    Charilaos> par(mar = c(3,3,2,1))

    Charilaos> hist(x, breaks = 20, main = NULL, ylim = c(-2, max(hs$counts)))     Charilaos> boxplot(x, horizontal = T, axes = T, add = T, at = -1)

    Charilaos> The problem is the following.

    Charilaos> ........................

    Charilaos> On an OT note, I haven't seen this way of
    Charilaos> combining a histogram with a boxplot (perhaps I
    Charilaos> haven't looked really hard). I thought it would
    Charilaos> be useful for my students to see them next to
    Charilaos> each other, to develop a feeling for what
    Charilaos> histograms might correspond to what boxplots. Is
    Charilaos> there perhaps some reason why I should avoid
    Charilaos> showing those graphs to them like that, that I am
    Charilaos> not aware of? Or just a reason why I haven't seen     Charilaos> them combined like this much?

The 'sfsmisc' package (on CRAN) has been containing a function called hist.bxp() which does these plots, for a very long time --- actually for almost a longer time than R exists. It was part of our internal collection of S-plus "goodies" since 1995.

Martin Maechler, ETH Zurich



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