[Rd] barplot manpage (PR#7331)

dan at bolser.co.uk dan at bolser.co.uk
Tue Nov 2 01:12:19 CET 2004

Full_Name: Dan B
Version: R 2.0.0 (2004-10-04).
OS: Fedora 2
Submission from: (NULL) (

The man page for barplot (?barplot) is confusing...

cex.axis: expansion factor for numeric axis labels.
cex.names: expansion factor for axis names (bar labels).

What is an 'expansion factor', and what does it do in this context?

axis.lty: the graphics parameter 'lty' applied to the axis and tick
          marks of the categorical (default horizontal) axis.  Note
          that by default the axis is suppressed.

This makes no sense unless you know what it does already (which I don't). So
this is more of a programmers cleft note in a 'common language' than a function
documentation page.

say 'mp', giving the coordinates of _all_ the bar midpoints drawn,

Say what?

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