From: stephen sefick <ssefick_at_gmail.com>

Date: Tue, 25 Nov 2008 08:07:07 -0500

Date: Tue, 25 Nov 2008 08:07:07 -0500

#handy if you like ggplot2 as this is required
#I think this is what you want

library(reshape)

m <- matrix(1:20, nrow=4, dimnames=list(LETTERS[1:4], letters[1:5]))
melt(m)

On Tue, Nov 25, 2008 at 8:01 AM, Gabor Grothendieck
<ggrothendieck_at_gmail.com> wrote:

> Try this:

*>
**>> as.data.frame.table(m)
**> Var1 Var2 Freq
**> 1 A a 1
**> 2 B a 2
**> 3 C a 3
**> 4 D a 4
**> 5 A b 5
**> 6 B b 6
**> 7 C b 7
**> 8 D b 8
**> 9 A c 9
**> 10 B c 10
**> 11 C c 11
**> 12 D c 12
**> 13 A d 13
**> 14 B d 14
**> 15 C d 15
**> 16 D d 16
**> 17 A e 17
**> 18 B e 18
**> 19 C e 19
**> 20 D e 20
**>
**>
**> On Tue, Nov 25, 2008 at 7:19 AM, Daren Tan <daren76_at_hotmail.com> wrote:
**>>
**>>
**>> I forgot the reshape equivalent for converting from wide to long format. Can someone help as my matrix is very big. The followin is just an example.
**>>
**>>> m <- matrix(1:20, nrow=4, dimnames=list(LETTERS[1:4], letters[1:5]))
**>>> m
**>> a b c d e
**>> A 1 5 9 13 17
**>> B 2 6 10 14 18
**>> C 3 7 11 15 19
**>> D 4 8 12 16 20
**>>
**>>> as.data.frame(cbind(rep(rownames(m), ncol(m)), rep(colnames(m), each=nrow(m)), c(m)))
**>> V1 V2 V3
**>> 1 A a 1
**>> 2 B a 2
**>> 3 C a 3
**>> 4 D a 4
**>> 5 A b 5
**>> 6 B b 6
**>> 7 C b 7
**>> 8 D b 8
**>> 9 A c 9
**>> 10 B c 10
**>> 11 C c 11
**>> 12 D c 12
**>> 13 A d 13
**>> 14 B d 14
**>> 15 C d 15
**>> 16 D d 16
**>> 17 A e 17
**>> 18 B e 18
**>> 19 C e 19
**>> 20 D e 20
**>>
**>> ______________________________________________
**>> R-help_at_r-project.org mailing list
**>> https://stat.ethz.ch/mailman/listinfo/r-help
**>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
**>> and provide commented, minimal, self-contained, reproducible code.
**>>
**>
**> ______________________________________________
**> R-help_at_r-project.org mailing list
**> https://stat.ethz.ch/mailman/listinfo/r-help
**> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
**> and provide commented, minimal, self-contained, reproducible code.
**>
*

-- Stephen Sefick Let's not spend our time and resources thinking about things that are so little or so large that all they really do for us is puff us up and make us feel like gods. We are mammals, and have not exhausted the annoying little problems of being mammals. -K. Mullis ______________________________________________ R-help_at_r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.Received on Tue 25 Nov 2008 - 13:09:16 GMT

Archive maintained by Robert King, hosted by
the discipline of
statistics at the
University of Newcastle,
Australia.

Archive generated by hypermail 2.2.0, at Tue 25 Nov 2008 - 13:30:28 GMT.

*
Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help.
Please read the posting
guide before posting to the list.
*