[Rd] par(mgp) - unexpected behaviour (PR#6046)

[Uwe Ligges]

BoersN at pac.dfo-mpo.gc.ca wrote:
> 
> Full_Name: Nicholas Boers
> Version: 1.8.1
> OS: Windows XP Home Edition, Debian GNU/Linux 3.0
> Submission from: (NULL) (24.68.84.10)
> 
> mgp[2] specifies the axis labels' margin line relative to that of the axis line
> (mgp[3]).  The `par' help does not document this behaviour.
> 
> The following code demonstrates my observation:
>   plot.new();
>   par(mgp = c(3, 2, 1));
>   box();
>   title(xlab = "x");
>   axis(1);
> 
> Based on the R documentation, combined with S-PLUS' behaviour, I would expect R
> to plot the axis labels and title at lines 2 and 3, respectively.  However, it
> plots both at line 3.
> 
> The relevant section of the `par' documentation states:
>   'mgp' The margin line (in 'mex' units) for the axis title, axis
>         labels and axis line. The default is 'c(3, 1, 0)'.
> 
> Thank-you for your time and considering this bug report.


The margin line number of axis labels is *relative* to the line number
of the axis line, hence not a bug (or if a bug, then a too sparse
documentation of par(mgp)).


Uwe Ligges

BTW: Don't submit bug reports twice (already submitted as PR#6045
before).