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.

Thanks,
Arni

R 2.2.0pat on WinXP

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