[R] Suppressing observation numbers

From: Nam-Ky Nguyen <nkn_at_turing.une.edu.au>
Date: Thu 03 Mar 2005 - 09:14:28 EST


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)?

Regards,
NKN
> # Orthogonal blocking
> data=read.table("cut.txt",header=T)
> 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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Received on Thu Mar 03 09:25:17 2005

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