On May 23, 2010, at 8:41 PM, Claudia Rodriguez wrote:
Dear Friends.
I am just starting to use R. And in this occasion I want to
construct a
high-dimensional contingency table, because I want to crate a mosaic
plot
with the vcd package.
My table is in this format:
año ac.rep cat.gru conteos
1 2005 R parejas 253
2 2005 N parejas 23
3 2006 R parejas 347
4 2006 N parejas 39
5 2007 R parejas 266
6 2007 N parejas 83
7 2005 R solitarios 53
8 2005 N solitarios 1
9 2006 R solitarios 109
10 2006 N solitarios 8
11 2007 R solitarios 85
12 2007 N solitarios 34
13 2005 R trios 29
14 2005 N trios 1
15 2006 R trios 62
16 2006 N trios 19
17 2007 R trios 48
18 2007 N trios 3
How can I do this?
I saw the help of the "mosaic" command, and I found that the files
are like
a hig-dimensional contingency table (for example "Tytanic" data),
but I was
unable to do the change.
mosaic's help page says you need to supply a data.frame or a
contingency table. Given that you do not have separate records for
each individual, but rather have counts in the last column, you can
use xtabs to create a table object. Note the help page of xtabs says:
## xtabs() <-> as.data.frame.table()
You need to tell xtabs which column has the counts.
xtabs(conteos ~.,dta)
mosaic( cat.gru ~año, data = xtabs( conteos ~., dta))
--
David.
Thank you very much!!!
With best wishes
--
Claudia I. Rodríguez-Flores
Maestra en Ciencias Biológicas
Laboratorio de Ecología, UBIPRO
UNAM FES-Iztacala
52-55-56231130
David Winsemius, MD
West Hartford, CT
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