[Rd] axTicks.Rd documentation bug

Martin Maechler maechler at stat.math.ethz.ch
Mon Feb 7 18:02:39 CET 2011

>>>>> Ben Bolker <bbolker at gmail.com>
>>>>>     on Fri, 04 Feb 2011 10:44:12 -0500 writes:

    > ?axTicks says:

    >     usr: numeric vector of length four, defaulting to
    > ‘par("usr")’ giving horizontal (‘x’) and vertical (‘y’)
    > user coordinate limits.

    >  but this is not how the function is implemented -- in
    > fact 'usr' should be a vector of length two corresponding
    > to the appropriate elements of par("usr") [1:2 if side is
    > 1 or 3, 3:4 if side is 2 or 4].

    >   A patch for src/library/graphics/man/axTicks.Rd against
    > the latest SVN is attached (I hope it makes it through).

    >   I also included an extended example of how to use
    > axTicks without reference to an existing plot in the
    > logarithmic axis case: it took me quite a bit of digging
    > in documentation and source code to figure out how to do
    > this for myself, so I think it would be useful to others
    > ...

Thanks a lot, Ben!

I've also added the new example .. though slightly modified.
Notably I'm a tiny bit disappointed ;-) that you were not aware of
the existence of the  extendrange() function ...

Martin Maechler

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