Hi
>
> Hi,
>
> I am creating a function and ran into the problem of selecting a column
> from a dataset. It seems as though the $ function (as in
data$columnname)
> does not apply in the function. In simplified version:
>
> This works:
> testf2<-function(data,columnnumber){print(data[,columnn
Just put the columnname variable into the brackets as well: they
accept strings.
As a general rule, always use the brackets (single or double) when
programming: `$` has some great features for interactive use but can
bite if you're not careful.
Michael
On Fri, Jan 13, 2012 at 5:34 PM, Julia Burg
Hi,
I am creating a function and ran into the problem of selecting a column
from a dataset. It seems as though the $ function (as in data$columnname)
does not apply in the function. In simplified version:
This works:
testf2<-function(data,columnnumber){print(data[,columnnumber])}
But this doesn
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