[R] plot.prcomp() call/eval

[Jessica Streicher]

Thanks Josh,

that soggy sandwhich saves me a LOT of code by the way,
I'll keep it  for the time being  ;)

greetings
Jessica

On 28.06.2012, at 17:15, Joshua Wiley wrote:

> 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/