Philipp Rappold wrote:
>
> Sorry guys, but I have another one:
>
>
> I want to write a function that returns a certain column of a
> dataframe. The function accepts two argument: the dataframe and the
> name of the column, but the column is not given as a "string" but as
> a variable name.
>
> k <- function(df, col) df[col]
>
>
You can do this by using deparse(substitute()) to coerce the variable to a
character string:
k <- function(df, col){
return( df[ deparse(substitute(col)) ] )
}
testData <- data.frame( foo = 1:3, bar = LETTERS[1:3] )
k( testData, bar )
bar
1 A
2 B
3 C
Hope this helps!
-Charlie
--
View this message in context:
http://n4.nabble.com/Access-dataframe-with-variable-name-in-function-tp1490389p1490410.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
R-help@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.
