Hi
Suppose I have two tables of counts of different animals and I
wish to pool them so the total of the sum is the sum of the total.
Toy example follows (the real ones are ~10^3 species and ~10^6
individuals).
x and y are zoos that have merged and I need a combined inventory
including animals that are temporarily absent.
> (x <- as.table(c(cats=3,squid=7,pigs=2,dogs=1,slugs=0)))
cats squid pigs dogs slugs
3 7 2 1 0
> (y <- as.table(c(cats=4,dogs=5,slugs=3,crabs=0)))
cats dogs slugs crabs
4 5 3 0
> (desired.output <- as.table(c
(cats=7,squid=7,pigs=2,dogs=6,slugs=3,crabs=0)))
cats squid pigs dogs slugs crabs
7 7 2 6 3 0
>
Note that we have 7 cats altogether, and the crabs correctly show
as zero counts.
How to do this nicely in R?
--
Robin Hankin
Uncertainty Analyst
National Oceanography Centre, Southampton
European Way, Southampton SO14 3ZH, UK
tel 023-8059-7743
one approach is the following:
x <- as.table(c(cats=3,squid=7,pigs=2,dogs=1,slugs=0))
y <- as.table(c(cats=4,dogs=5,slugs=3,crabs=0))
########################
out <- merge(as.data.frame(x), as.data.frame(y), by = "Var1", all =
TRUE)
desired.output <- rowSums(out[c("Freq.x", "Freq.y")],
na.rm = TRUE)
names(desired.output) <- out$Var1
as.table(desired.output)
I hope it helps.
Best,
Dimitris
----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
http://www.student.kuleuven.be/~m0390867/dimitris.htm
----- Original Message -----
From: "Robin Hankin" <r.hankin at noc.soton.ac.uk>
To: "RHelp" <r-help at stat.math.ethz.ch>
Sent: Monday, June 19, 2006 9:33 AM
Subject: [R] combining tables
> Hi
>
> Suppose I have two tables of counts of different animals and I
> wish to pool them so the total of the sum is the sum of the total.
>
> Toy example follows (the real ones are ~10^3 species and ~10^6
> individuals).
> x and y are zoos that have merged and I need a combined inventory
> including animals that are temporarily absent.
>
>
> > (x <- as.table(c(cats=3,squid=7,pigs=2,dogs=1,slugs=0)))
> cats squid pigs dogs slugs
> 3 7 2 1 0
> > (y <- as.table(c(cats=4,dogs=5,slugs=3,crabs=0)))
> cats dogs slugs crabs
> 4 5 3 0
> > (desired.output <- as.table(c
> (cats=7,squid=7,pigs=2,dogs=6,slugs=3,crabs=0)))
> cats squid pigs dogs slugs crabs
> 7 7 2 6 3 0
> >
>
>
>
>
> Note that we have 7 cats altogether, and the crabs correctly show
> as zero counts.
>
>
> How to do this nicely in R?
>
>
>
>
> --
> Robin Hankin
> Uncertainty Analyst
> National Oceanography Centre, Southampton
> European Way, Southampton SO14 3ZH, UK
> tel 023-8059-7743
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
>
Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
Try this: both <- c(x,y) as.table(tapply(both, names(both), sum)) On 6/19/06, Robin Hankin <r.hankin at noc.soton.ac.uk> wrote:> Hi > > Suppose I have two tables of counts of different animals and I > wish to pool them so the total of the sum is the sum of the total. > > Toy example follows (the real ones are ~10^3 species and ~10^6 > individuals). > x and y are zoos that have merged and I need a combined inventory > including animals that are temporarily absent. > > > > (x <- as.table(c(cats=3,squid=7,pigs=2,dogs=1,slugs=0))) > cats squid pigs dogs slugs > 3 7 2 1 0 > > (y <- as.table(c(cats=4,dogs=5,slugs=3,crabs=0))) > cats dogs slugs crabs > 4 5 3 0 > > (desired.output <- as.table(c > (cats=7,squid=7,pigs=2,dogs=6,slugs=3,crabs=0))) > cats squid pigs dogs slugs crabs > 7 7 2 6 3 0 > > > > > > > Note that we have 7 cats altogether, and the crabs correctly show > as zero counts. > > > How to do this nicely in R? > > > > > -- > Robin Hankin > Uncertainty Analyst > National Oceanography Centre, Southampton > European Way, Southampton SO14 3ZH, UK > tel 023-8059-7743 > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html >