Re: [Rd] Ordering of values returned by unique

From: Witold Eryk Wolski <wolski_at_molgen.mpg.de>
Date: Thu 30 Sep 2004 - 03:25:06 EST

Hi,

If you go to the frame on www.r-project.org -> documentation -> publication and search for "blue book" "green book" you will find that this refers to two books :
/"The New S Language"
//"Programming with Data"
respectively
/
Mass refers to "/Modern Applied Statistics with S"/ /E

Earl F. Glynn wrote:

>"Tony Plate" <tplate@blackmesacapital.com> wrote in message
>news:6.1.0.6.2.20040929094231.05e42a00@mailhost.blackmesacapital.com...
>
>
>>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
>
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>

-- 
Dipl. bio-chem. Witold Eryk Wolski         
MPI-Moleculare Genetic
Ihnestrasse 63-73 14195 Berlin           _
tel: 0049-30-83875219                   'v'
http://www.molgen.mpg.de/~wolski       /   \
mail: witek96@users.sourceforge.net  ---W-W----
      wolski@molgen.mpg.de

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Received on Thu Sep 30 03:33:57 2004

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