> col=c("blue","red")mydfr$[treatment]
Yes, but I would like to use the function for lots of other dataframes
as well, so embedding 'mydfr' in the function is not the ideal
solution...
remko
-------------------------------------------------
Remko Duursma
Post-Doctoral Fellow
Centre for Plants and the Environment
University of Western Sydney
Hawkesbury Campus
Richmond NSW 2753
Dept of Biological Science
Macquarie University
North Ryde NSW 2109
Australia
Mobile: +61 (0)422 096908
www.remkoduursma.com
On Mon, Sep 14, 2009 at 6:08 PM, Polwart Calum (County Durham and
Darlington NHS Foundation Trust) <calum.polw...@nhs.net> wrote:
>>
>> # I tried defining a function like this
>> myplot <- function(...)plot(..., pch=19, col=c("blue","red")[treatment])
>>
>> # So i can call it like this:
>> with(mydfr, myplot(Xmeas, Ymeas))
>>
>> # but:
>> Error in plot.xy(xy, type, ...) : object 'treatment' not found
>>
> basically that is something like calling:
>
> myplot( mydfr$Xmeas, mydfr$Ymeas )
>
> So plot doesn't know that treatment is within mydfr...
>
> changing your function to:
>
> myplot <- function(...) {
> plot(...,
> pch=19,
> col=c("blue","red")mydfr$[treatment]
> )
> }
>
> should work?
>
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