Please read the help for par(mfrow)! AFAICS this is nothing to do with boxplot().

          In a layout with exactly two rows and columns the base value
          of '"cex"' is reduced by a factor of 0.83: if there are three
          or more of either rows or columns, the reduction factor is
          0.66.

See also the 'consider the alternatives' in that entry.

On Fri, 6 Jun 2008, Sebastian Merz wrote:

Hi all!

So far I learned some R but finilizing my plots so they look
publishable seems not to be possible.

I set up some boxplots. Everything works well but when I put more then
two of them in one plot the labels of the axes appear smaller than the
normal font size.

x <- rnorm(30)
y <- rnorm(30)
par(mfrow=c(1,4))
boxplot(x,y, names=c("horray", "hurra"))
mtext("Jubel", side=1, line=2)

In case I take one or two boxplots this does not happen:
par(mfrow=c(1,2))
boxplot(x,y, names=c("horray", "hurra"))
mtext("Jubel", side=1, line=2)

The cex.axis seems not to be changed, as setting it to 1.0 doesn't
change the behaviour. If cex.axis=1.3 in the first example the font
size used by boxplot and by mtext is about the same. But as I use a
function to draw quite some of these plots this "hack" is not a proper
solution.

I couldn't find anything about this behaviour in the documention or
the inet.

Can anybody explain? All hints are appriciated.

Thanks,
S. Merz

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Brian D. Ripley,                  [EMAIL PROTECTED]
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