R help - Jun 2012 - plot.prcomp() call/eval

Hi!

I am getting a lot of numbers in the background of the pca screeplots if i use
call("plot") and eval(somecall).
Til now, creating the calls and plotting later on this way worked fine. Example:

 pcaI<-prcomp(iris[,1:4])
 plot(pcaI)

 x<-call("plot",pcaI)
 eval(x)

Anyone got an idea how i can avoid that? (also it might take a second or so for
the numbers to appear, so wait a bit before you tell me everythings fine ^^)
	[[alternative HTML version deleted]]

Hi Jessica,

x <- call("plot", quote(pcaI))
eval(x)

that said, I suspect you would be better off avoiding this idiom
altogether.  Storing unevaluated calls is akin to putting tomatoes on
your sandwich before packing it for work---you can do it but you end
up with a soggy sandwich by the time you are eating it.  Better to
store the bread and tomatoe separately and put them together when you
want a delicious sandwich.

Cheers,

Josh

On Thu, Jun 28, 2012 at 8:03 AM, Jessica Streicher
<j.streicher at micromata.de> wrote:
> Hi!
>
> I am getting a lot of numbers in the background of the pca screeplots if i
use call("plot") and eval(somecall).
> Til now, creating the calls and plotting later on this way worked fine.
Example:
>
> ?pcaI<-prcomp(iris[,1:4])
> ?plot(pcaI)
>
> ?x<-call("plot",pcaI)
> ?eval(x)
>
> Anyone got an idea how i can avoid that? (also it might take a second or so
for the numbers to appear, so wait a bit before you tell me everythings fine ^^)
> ? ? ? ?[[alternative HTML version deleted]]
>
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-- 
Joshua Wiley
Ph.D. Student, Health Psychology
Programmer Analyst II, Statistical Consulting Group
University of California, Los Angeles
https://joshuawiley.com/