If you mean how to create a matrix like below, then you can code it as
arm - 1:10
study - rep( 1:4, c(3,3,2,2) )
Num - c(2, 9, ...)
df - cbind( arm, study, Num )
but this is really painful. If you have this information stored in
Excel, save it as tab delimited or comma separated format and read in
using read.delim or read.csv respectively. You can also use scan.
See help(read.delim), help(read.csv) or help(scan).
If you mean how to extract information from such a matrix, then see
help(subset) or read the manuals.
Regards, Adai
On Thu, 2005-07-28 at 17:45 +0100, Hathaikan Chootrakool wrote:
I am a new user, i was wondering how to define a collection of data in
matrix form,
this is a part of my data,there are 26 studies, 3 Treatments
Arm No Study no. Treatment Num(r) Total(n)
111 1 243
221 2 942
331 3 13 41
442 1 12 68
552 2 13 73
662 3 13 72
773 1 4 20
883 3 4 16
994 1 20 116
10 104 3 30 111
I would like to use matrix [study No,Treatment] how can i define code for
using matrix?
has anyone can help me?,thank you very much.
Hathaikan
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