[R] Possible x-axis label bug in barplot() when "plot = F"

[Marc Schwartz]

Hi all,

I have searched the R-help archives and the bug tracking system and
could not find this one. I am hoping that someone can either reproduce
this or tell me that I am missing a step that is the proximate cause.

I am running R 1.5.0 Patched (May 15, 2002 compiled version kindly
distributed by Prof. Ripley) under WinXP Pro on a P4m platform, which is
up to date with all current patches. The display device is a UXGA 1600 x
1200 LCD panel running in 32 bit mode. If additional HW information is
required, let me know.

The issue appears to be the horizontal positioning of the x-axis labels
when "plot = F" in barplot().

The following simple code segments, if reproducible, should help
demonstrate:

> plot.new()
> midpts <- barplot(1:10, axes = F, axisnames = F)
> axis(1, at = midpts)

The above code results in a barplot with no axis labels initially.  The
call to axis() then results in appropriate x-axis labels under the
midpts of the vertical bars. The x-axis labels are the midpts values.


> plot.new()
> midpts <- barplot(1:10, axes = F, axisnames = F, plot = F)
> axis(1, at = midpts)

The above code, now with "plot = F", results in a barplot with no bars
or axis labels initially.  When I call axis(), the first axis label
("0.7") is offset well to the right, such that it is the only label
displayed.

Am I missing a step that sets the x-axis scaling when "plot = F" or is
this a bug?

If more information is required, let me know.

Thanks,

Marc Schwartz


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