table(unique(df)$PROJECT)
On Tue, 2015-03-31 at 14:51 -0500, Walter Anderson wrote:
> I have a data frame that shows all of the parks (including duplicates)
> that are impacted by a projects 'footprint':
>
> PROJECT PARKNAME
> A PRK A
> A PRK B
> A PRK A
> B PRK C
> B
Hello,
Try the following.
table(unique(df)$PROJECT)
And please note that 'df' is the name of an R function, use something else.
Hope this helps,
Rui Barradas
Em 31-03-2015 20:51, Walter Anderson escreveu:
I have a data frame that shows all of the parks (including duplicates)
that are impac
Sure: tell R you want unique rows.
> mydf <- data.frame(PROJECT=c("A","A","A","B","B","C","C"), PARKNAME=c("PRK
> A", "PRK B", "PRK A", "PRK C", "PRK A", "PRK B", "PRK D"),
> stringsAsFactors=FALSE)
> mydf
PROJECT PARKNAME
1 APRK A
2 APRK B
3 APRK A
4 BP
I have a data frame that shows all of the parks (including duplicates)
that are impacted by a projects 'footprint':
PROJECT PARKNAME
A PRK A
A PRK B
A PRK A
B PRK C
B PRK A
C PRK B
C PRK D
...
What I need is a cross tabulation that shows me the number of
4 matches
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