"Tony Plate" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > I depend on this all the time, so I also checked some references. In the > Blue book the documentation for the functions unique and duplicated is > combined and implies the above. In MASS 4th Ed, the page referred to by > the index entry for 'unique' (p48, #9 in my copy) states that 'unique' > removes duplicates as identified by 'duplicated', which implies that the > order of retained elements is not changed. The Green book has no index > entry for 'unique'. In S-plus the implementation of unique.default(x) uses > x[!duplicated(x)].
So what is the "Blue book", the "Green book", and MASS 4th Ed? efg ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
