Here is a solution using dplyr.
dataset <- data.frame(
region = rep(1:2, c(6, 1)),
city = rep(1:2, c(5, 2)),
town = rep(1:2, c(4, 3)),
district = rep(1:3, c(2, 2, 3))
)
library(dplyr)
dataset %>%
group_by(region) %>%
mutate(n.region = n()) %>%
group_by(city, add = TRUE) %>%
mutate(n.city = n()) %>%
group_by(town, add = TRUE) %>%
mutate(n.town = n()) %>%
group_by(district, add = TRUE) %>%
mutate(n.district = n())
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
To call in the statistician after the experiment is done may be no more
than asking him to perform a post-mortem examination: he may be able to say
what the experiment died of. ~ Sir Ronald Aylmer Fisher
The plural of anecdote is not data. ~ Roger Brinner
The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey
2015-10-06 6:32 GMT+02:00 PIKAL Petr <petr.pikal at precheza.cz>:
> Hi
>
> there are maybe better solutions but I would use ave with length function
> for each column separately to add new column.
>
> See ?ave
>
> Cheers
> Petr
>
> > -----Original Message-----
> > From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Val
> > Sent: Tuesday, October 06, 2015 1:01 AM
> > To: r-help at r-project.org
> > Subject: [R] count by category
> >
> > Hi All,
> >
> > I have a data set ( region, city, town and district). The data looks
> > like region, city, town, district
> > 1 1 1 1
> > 1 1 1 2
> > 1 1 1 3
> > 1 1 2 1
> > 1 1 2 2
> > 1 2 1 1
> >
> > I want the counts for region, city and town. Here region 1 has 6
> > records, city 1 has 5 records and city 2 has 1 record. Similarly, town
> > 1 has 3 records and town 2 has 2 and so on.
> > Desired out put to a file
> > 1 1 1 1 6 5 3
> > 1 1 1 2 6 5 3
> > 1 1 1 3 6 5 3
> > 1 1 2 1 6 5 2
> > 1 1 2 2 6 5 2
> > 1 2 3 1 6 1 1
> >
> > Thank you in advance
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide http://www.R-project.org/posting-
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> > and provide commented, minimal, self-contained, reproducible code.
>
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