pairs(oma) warnings (PR#8252)

Unlike R 2.1.1, version 2.2.0 generates warnings when an 'oma' argument as
passed to pairs():

 A <- rnorm(100)
 B <- rnorm(100)
 pairs(cbind(A,B))                    # no warning
 pairs(cbind(A,B), oma=c(6,8,10,12))  # warnings in R 2.2.0

I think pairs() should draw the plot quietly, without warnings. Can't see
anything in the documentation indicating that an 'oma' argument should not
be passed in this way.

Yes, but they are only warnings.  oma is actually mentioned in the docs 
....

My complaint is that they ever occur, in this case from axis which says

      ...: other graphical parameters may also be passed as arguments to
           this function, particularly, 'cex.axis', 'col.axis' and
           'font.axis' for axis annotation, 'mgp' and 'xaxp' or 'yaxp'
           for positioning, 'tck' or 'tcl' for tick mark length and
           direction, 'las' for vertical/horizontal label orientation,
           or 'fg' instead of 'col', see 'par' on these.

and does not say which or that others cannot be so passed.

Fixed in R-patched but not mentioned in NEWS as this is so minor.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595