[R] par(new=TRUE) vs par(new=FALSE)

Uwe Ligges ligges at statistik.uni-dortmund.de
Mon Mar 14 19:23:42 CET 2005

Dirk Enzmann wrote:

> Just out of curiosity (and I hope that my question does not confuse 
> those who intuitively understood the par(new=TRUE) statement right in 
> the beginning):
> I would like to know whether beginners (learning R) had the same 
> difficulty as I had: Intuitively I thought that par(new=TRUE) would draw 
> a new plot (and not into an already existing plot) and that 
> par(new=FALSE) would not draw a new plot but draw into an already 
> existing plot - opposed to what the par(new=TRUE) statement actually 
> does. (It would be interesting to receive an answer also from those who 
> meanwhile reached an expert status  in working with the R syntax). 
> Perhaps my confusion is due to the fact that I am a trained right-handed 
> that really is a left-handed (those people tend to mistake contrasts).
> If there are a lot of people having this difficulty, I would like to 
> know why the decision was made to define the mode of action of the 
> par(new=TRUE) statement as it is now. Perhaps that helps me to 
> understand better the way programmers tend to think.

This has been defined ages ago in the blue book (maybe in the brown one, 
I don't have it handy), so no chance to redefine. It confuses several 
users, but ?par has the nice explaination:

'new: logical, defaulting to FALSE. If set to TRUE, the next high-level 
plotting command (actually plot.new) should not clean the frame before 
drawing "as if it was on a new device".'

Uwe Ligges

> *************************************************
> Dr. Dirk Enzmann
> Institute of Criminal Sciences
> Dept. of Criminology
> Schlueterstr. 28
> D-20146 Hamburg
> Germany
> phone: +49-040-42838.7498 (office)
>        +49-040-42838.4591 (Billon)
> fax:   +49-040-42838.2344
> email: dirk.enzmann at jura.uni-hamburg.de
> www: 
> http://www2.jura.uni-hamburg.de/instkrim/kriminologie/Mitarbeiter/Enzmann/Enzmann.html 
> ______________________________________________
> R-help at 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

More information about the R-help mailing list