RE: [R] Assign factor and levels inside function

From: Liaw, Andy <andy_liaw_at_merck.com>
Date: Thu 21 Apr 2005 - 06:03:24 EST


Wouldn't it be easier to do this?

> levels(y$one) <- seq(1, 9, by=2)
> y$one

[1] 1 1 3 3 5 7
attr(,"levels")
[1] 1 3 5 7 9

Andy

> From: Tim Howard
>
> R-help,
> After cogitating for a while, I finally figured out how to define a
> data.frame column as factor and assign the levels within a function...
> BUT I still need to pass the data.frame and its name
> separately. I can't
> seem to find any other way to pass the name of the data.frame, rather

> than the data.frame itself. Any suggestions on how to go
> about it? Is
> there something like value(object) or name(object) that I can't find?
>
> #sample dataframe for this example
> y <- data.frame(
> one=c(1,1,3,3,5,7),
> two=c(2,2,6,6,8,8))
>
> > levels(y$one) # check out levels
> NULL
>
> # the function I've come up with
> fncFact <- function(datfra, datfraNm){
> datfra$one <- factor(datfra$one, levels=c(1,3,5,7,9))
> assign(datfraNm, datfra, pos=1)
> }
>
> >fncFact(y, "y")
> > levels(y$one)
> [1] "1" "3" "5" "7" "9"
>
> I suppose only for aesthetics and simplicity, I'd like to have only
> pass the data.frame and get the same result.
> Thanks in advance,
> Tim Howard
>
>
> > version
> _
> platform i386-pc-mingw32
> arch i386
> os mingw32
> system i386, mingw32
> status
> major 2
> minor 0.1
> year 2004
> month 11
> day 15
> language R
>
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>
>



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Apr 21 09:44:13 2005

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