The example is reproducible! Did you see the first post? 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 9:19 PM, Paul Hiemstra <p.hiems...@geo.uu.nl> wrote: > Remko Duursma wrote: >>> >>> col=c("blue","red")mydfr$[treatment] >>> >> >> Yes, but I would like to use the function for lots of other dataframes >> as well, so embedding 'mydfr' in the function is not the ideal >> solution... >> > > The problem is that the info in 'treatment' is non-constant, and you need to > either pass on the info into the scope of the function, or you need to > calculate the values in 'treatment' inside the function. Could you provide > us with a reproducible example (as suggested in the posting guide), that > would make it much easier for us to answer you question > > veel succes! > Paul >> >> remko >> >> ------------------------------------------------- >> Remko Duursma >> Post-Doctoral Fellow >> >> Centre for Plants and the Environment >> University of Western Sydney >> Hawkesbury Campus >> Richmond NSW 2753 >> >> Dept of Biological Science >> Macquarie University >> North Ryde NSW 2109 >> Australia >> >> Mobile: +61 (0)422 096908 >> www.remkoduursma.com >> >> >> >> On Mon, Sep 14, 2009 at 6:08 PM, Polwart Calum (County Durham and >> Darlington NHS Foundation Trust) <calum.polw...@nhs.net> wrote: >> >>>> >>>> # I tried defining a function like this >>>> myplot <- function(...)plot(..., pch=19, col=c("blue","red")[treatment]) >>>> >>>> # So i can call it like this: >>>> with(mydfr, myplot(Xmeas, Ymeas)) >>>> >>>> # but: >>>> Error in plot.xy(xy, type, ...) : object 'treatment' not found >>>> >>>> >>> >>> basically that is something like calling: >>> >>> myplot( mydfr$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? >>> >>> >>> ******************************************************************************************************************** >>> >>> This message may contain confidential information. If yo...{{dropped:21}} >>> >>> ______________________________________________ >>> R-help@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide >>> http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >>> >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> > > > -- > Drs. Paul Hiemstra > Department of Physical Geography > Faculty of Geosciences > University of Utrecht > Heidelberglaan 2 > P.O. Box 80.115 > 3508 TC Utrecht > Phone: +3130 274 3113 Mon-Tue > Phone: +3130 253 5773 Wed-Fri > http://intamap.geo.uu.nl/~paul > > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.