How to findout the name of a dataframe
On Feb 17, 2013, at 5:51 AM, Frans Marcelissen wrote:
Let'say we have a dataframe mydata with column v1. If mydata$v1 is passed to a function, is there way, then, to extract the name of the dataframe? What I now do is passing the name of the dataframe to the funcion, so passing two parameters. Maybe with mydata$v1 it is not possible, but with mydata['v1'] or mydata[,'v1'] it is?
It will depend on the specifics. The usual way is with deparse(substitute(arg))
d <- data.frame(a="a")
gn <- function(col) print(deparse(substitute(col))) gn(d)
[1] "d"
gn(d$a)
[1] "d$a" You do realize that mydata$v1 is identical (after evaluation, anyway) to mydata[,'v1'] , but not to mydata['v1'], don't you?
gn(d['a'])
[1] "d[\"a\"]"
Thanks Frans ------------------- Frans Marcelissen fransiepansiekevertje at gmail.com [[alternative HTML version deleted]]
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