# Re: [R] Suppressing observation numbers

From: Nam-Ky Nguyen <nkn_at_turing.une.edu.au>
Date: Thu 03 Mar 2005 - 17:32:24 EST

Thank you VERY much for Brian's HINT and Rolf's ANSWER. NKN.

> On Thu, 3 Mar 2005, Nam-Ky Nguyen wrote:
>
>> Dear R gurus,
>>
>> Below is a part of the R output. Please consider the two lines:
>>> data
>>> model.matrix(m1)
>>
>> Is there a way of suppressing the observation numbers 1, 2, ...27 in the
>> output (I don't want these number to appear in the output)?
>
> Actually, these are the row names of a data frame, and the answer is yes.
> (Note: I _have_ answered your question!)
>
> If you meant to ask how to do it, here is a hint
>
> library(MASS); write.matrix(hills)
>
>>
>> Regards,
>> NKN
>>
>>> # Orthogonal blocking
>>> attach(data)
>>> data
>> b x1 x2 x3
>> 1 1 -1 -1 0
>> 2 1 -1 0 1
>> 3 1 -1 1 -1
>> 4 1 0 -1 0
>> 5 1 0 0 1
>> 6 1 0 1 -1
>> 7 1 1 -1 -1
>> 8 1 1 0 0
>> 9 1 1 1 1
>> 10 2 -1 -1 -1
>> 11 2 -1 0 0
>> 12 2 -1 1 1
>> 13 2 0 -1 1
>> 14 2 0 0 -1
>> 15 2 0 1 0
>> 16 2 1 -1 0
>> 17 2 1 0 1
>> 18 2 1 1 -1
>> 19 3 -1 -1 1
>> 20 3 -1 0 -1
>> 21 3 -1 1 0
>> 22 3 0 -1 -1
>> 23 3 0 0 0
>> 24 3 0 1 1
>> 25 3 1 -1 1
>> 26 3 1 0 -1
>> 27 3 1 1 0
>>> b=factor(b)
>>> y=rnorm(27)
>>> x4=x1*x2
>>> x5=x1*x3
>>> x6=x2*x3
>>> x7=x1*x1
>>> x8=x2*x2
>>> x9=x3*x3
>>> options(contrasts=c("contr.sum","contr.poly"))
>>> m1=lm(y~b+x1+x2+x3+x4+x5+x6+x7+x8+x9)
>>> model.matrix(m1)
>> (Intercept) b1 b2 x1 x2 x3 x4 x5 x6 x7 x8 x9
>> 1 1 1 0 -1 -1 0 1 0 0 1 1 0

>> 2 1 1 0 -1 0 1 0 -1 0 1 0 1
>> 3 1 1 0 -1 1 -1 -1 1 -1 1 1 1
>> 4 1 1 0 0 -1 0 0 0 0 0 1 0
>> 5 1 1 0 0 0 1 0 0 0 0 0 1
>> 6 1 1 0 0 1 -1 0 0 -1 0 1 1
>> 7 1 1 0 1 -1 -1 -1 -1 1 1 1 1
>> 8 1 1 0 1 0 0 0 0 0 1 0 0
>> 9 1 1 0 1 1 1 1 1 1 1 1 1
>> 10 1 0 1 -1 -1 -1 1 1 1 1 1 1
>> 11 1 0 1 -1 0 0 0 0 0 1 0 0
>> 12 1 0 1 -1 1 1 -1 -1 1 1 1 1
>> 13 1 0 1 0 -1 1 0 0 -1 0 1 1
>> 14 1 0 1 0 0 -1 0 0 0 0 0 1
>> 15 1 0 1 0 1 0 0 0 0 0 1 0
>> 16 1 0 1 1 -1 0 -1 0 0 1 1 0
>> 17 1 0 1 1 0 1 0 1 0 1 0 1
>> 18 1 0 1 1 1 -1 1 -1 -1 1 1 1
>> 19 1 -1 -1 -1 -1 1 1 -1 -1 1 1 1
>> 20 1 -1 -1 -1 0 -1 0 1 0 1 0 1
>> 21 1 -1 -1 -1 1 0 -1 0 0 1 1 0
>> 22 1 -1 -1 0 -1 -1 0 0 1 0 1 1
>> 23 1 -1 -1 0 0 0 0 0 0 0 0 0
>> 24 1 -1 -1 0 1 1 0 0 1 0 1 1
>> 25 1 -1 -1 1 -1 1 -1 1 -1 1 1 1
>> 26 1 -1 -1 1 0 -1 0 -1 0 1 0 1
>> 27 1 -1 -1 1 1 0 1 0 0 1 1 0
>> attr(,"assign")
>> [1] 0 1 1 2 3 4 5 6 7 8 9 10
>> attr(,"contrasts")
>> attr(,"contrasts")\$b
>> [1] "contr.sum"
>>
>>
>>
>> --
>> Nam-Ky Nguyen, Senior Lecturer
>> School of Mathematics, Statistics and Computer Science
>> University of New England, Armidale NSW 2351 Australia
>> nkn@turing.une.edu.au Tel: +612 6773 2763
>> http://turing.une.edu.au/~nkn Fax: +612 6773 3312
>>
>> Please convert Word files to PDF files before sending them to me.
>> See http://www.gnu.org/philosophy/no-word-attachments.html
>>
>> ______________________________________________
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>>
>
> --
> Brian D. Ripley, ripley@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
>

```--
Nam-Ky Nguyen, Senior Lecturer
School of Mathematics, Statistics and Computer Science
University of New England, Armidale NSW 2351 Australia
nkn@turing.une.edu.au              Tel: +612 6773 2763
http://turing.une.edu.au/~nkn      Fax: +612 6773 3312

Please convert Word files to PDF files before sending them to me.
See http://www.gnu.org/philosophy/no-word-attachments.html

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```
Received on Thu Mar 03 17:49:50 2005

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