R 1.5.0: axis() does not honor the xaxp argument (PR#1654)

[rdm28@cornell.edu]

----------------------- transcript --------------------------
$ R --vanilla

R : Copyright 2002, The R Development Core Team
Version 1.5.0  (2002-04-29)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type `license()' or `licence()' for distribution details.

R is a collaborative project with many contributors.
Type `contributors()' for more information.

Type `demo()' for some demos, `help()' for on-line help, or
`help.start()' for a HTML browser interface to help.
Type `q()' to quit R.

> plot(c(0,1),c(0.2,0.3),xaxt="n")
> axis(1,xaxp=c(0,1,4))
> version
         _
platform i586-pc-linux-gnu
arch     i586
os       linux-gnu
system   i586, linux-gnu
status
major    1
minor    5.0
year     2002
month    04
day      29
language R
>
------------------------end transcript ---------------------

I expect only 4 intervals on the x-axis, but find 5 intervals.  The same
problem seems to exist for axis() with a yaxp argument.

The sequence:

> plot(c(0,1),c(0.2,0.3),xaxt="n")
> par(xaxp=c(0,1,4))
> axis(1)

does draw an axis with four intervals, though.


On R-Help, in response to my question about this, Paul Murrell
<p.murrell@auckland.ac.nz> wrote:

> This appears to be a bug.  axis() should respond to an "in-line" xaxp
> setting.
>
> I can see a place in the C code where the problem appears to be, but an
> attempted quick fix failed.
>
> Could you please submit a bug report so that I (or someone else) will
> remember to have a proper look later?
>
> Thanks
>
> Paul


Thanks,
--
Robert Merithew





-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-devel-request@stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._