I have a huge college dataset and I want to be able to find which colleges
appear more than once in the dataset. How would I go about doing this? The
variable college is a factor. If I just do table(college) it is impossible to
find where there are repetitions. Any help would be greatly appreciated!
Lynna
[[alternative HTML version deleted]]
Here you have an example:
> colleges <- factor( c("a", "a", "b",
"c", "c" ))
> colleges
[1] a a b c c
Levels: a b c
> table( colleges )
colleges
a b c
2 1 2
> colleges.count <- table( colleges )[colleges]
> colleges.count
colleges
a a b c c
2 2 1 2 2
> which( colleges.count > 1 )
a a c c
1 2 4 5
Kristen Mark wrote:> I have a huge college dataset and I want to be able to find which colleges
appear more than once in the dataset. How would I go about doing this? The
variable college is a factor. If I just do table(college) it is impossible to
find where there are repetitions. Any help would be greatly appreciated!
>
> Lynna
>
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
>
college=c("Columbia","Columbia","Harvard","Harvard","NYU")
unique(college)
table(college)
unique(college)[table(college)>1]
HTH
Daniel
-------------------------
cuncta stricte discussurus
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Von: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Im
Auftrag von Kristen Mark
Gesendet: Sunday, December 06, 2009 6:41 PM
An: r-help at r-project.org
Betreff: [R] help with repeated values
I have a huge college dataset and I want to be able to find which colleges
appear more than once in the dataset. How would I go about doing this? The
variable college is a factor. If I just do table(college) it is impossible
to find where there are repetitions. Any help would be greatly appreciated!
Lynna
[[alternative HTML version deleted]]
______________________________________________
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.