R help - Sep 2012 - $ operator is invalid for atomic vectors

HI all- 

I have used this .fun in S+ without a problem however, in R when I run this
code to generate multiple graphs:

trendplot<-function(datafr,dataf2, abbrev="",
titlestr="",
devname="s",filen="",styr=1990,endyr=2012) {
if (!is.null(dev.list())) {dev.off()}

dataf<-datafr[datafr$abbrev==abbrev,]			#subset entire dataset with one
species at a time
dataf2sp<-dataf2[dataf2$abbrev==abbrev,]  etc... 

It returns  "Error in dataf2$abbrev : $ operator is invalid for atomic
vectors"

Is there an easy fix for this error?

Thanks for the help- 

Alexis




--
View this message in context:
http://r.789695.n4.nabble.com/operator-is-invalid-for-atomic-vectors-tp4643189.html
Sent from the R help mailing list archive at Nabble.com.

Hi,

On Fri, Sep 14, 2012 at 2:33 PM, agrins <agrinde at d.umn.edu>
wrote:
> HI all-
>
> I have used this .fun in S+ without a problem however, in R when I run this
> code to generate multiple graphs:
>
> trendplot<-function(datafr,dataf2, abbrev="",
titlestr="",
> devname="s",filen="",styr=1990,endyr=2012) {
> if (!is.null(dev.list())) {dev.off()}
>
> dataf<-datafr[datafr$abbrev==abbrev,]                   #subset entire
dataset with one
> species at a time
> dataf2sp<-dataf2[dataf2$abbrev==abbrev,]  etc...
>
> It returns  "Error in dataf2$abbrev : $ operator is invalid for atomic
> vectors"
>
> Is there an easy fix for this error?
I suspect you just have to ensure that the thing you are passing in to
the `dataf2` parameter is in fact a data.frame -- the error you are
getting suggests that it is currently not.

Also -- have no fear for the space bar, it is your friend ;-)

-- 
Steve Lianoglou
Graduate Student: Computational Systems Biology
 | Memorial Sloan-Kettering Cancer Center
 | Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact