Please delete my e-mail judit.barroso@montana.edu

Sorry -- previous versiuon prematurely sent. Full version is:

 Yikes!  You should never have to do this sort of thing (writing stuff  
out to files, etc.)

 What is wanted, I believe, is ?do.call as in

 do.call(boxplot, z)

 where z is list(a,b,c)   as Sarah described.

 However, I think you might do even better in terms of controlling  
options, labels, etc. if you would get the data into standard flat  
file format (data frame) as

Result     Source
 1            a
 3           b
2             b
 5         c
... etc.

(This is easy to do in R and via many packages.) and then use he 
formula interface in the lattice ?bwplot  function for th eplot.

Cheers,
Bert

result

On Mon, Dec 12, 2011 at 1:43 PM, Thomas Adams 
<thomas.adams at noaa.gov>

wrote:

Ryan,

I think you could do what you want by having the vector data 
written to separate files; then create a file containing the 
individual file

names. In

R, read the file containing the list of file names and loop through 
this reading in the individual vector files. Maybe this is an 
inelegant,

brute

force approach, but it has worked for me with essentially the same

problem.

Tom

On Mon, Dec 12, 2011 at 4:24 PM, Ryan Utz <utz.ryan at gmail.com> wrote:

Hello,

I'm attempting to write a code that automatically imports data 
from different files (with different lengths-just one variable) 
and makes

tidy

box plots for comparison. I can successfully import the data and

create a

list of the vectors I want to compare. But I cannot, for the life 
of

me,

figure out how to generate box plots using the "list" option. 
Suppose

these

are my data:

a<-c(1,1,1,1,2,3,2,1,2,3)
b<-c(2,2,2,3,4,4,4,3,3)
c<-c(4,3,3,2,3,4,5,3,3,3,4,4,5,6,3,2)

And this is my list of the vectors I'm interested in:

 z<-list(c("a","b","c"))

Well, this successfully generates the kind of boxplot I want:

boxplot(a,b,c)

But this does not:

boxplot(z)

Because I'm trying to write an automatic plot-generator as the 
amount

of

data I'm working with will typically vary, I need to write this to

handle

any number of data vectors.

I've tried every imaginable means of tweaking the name of "z", 
with

zero

success. And I've scoured the help pages for about 45 minutes 
(just to preempt any "read the help" responses). Please help!

Thanks,
Ryan

--

Ryan Utz, Ph.D.
Aquatic Ecologist/STREON Scientist National Ecological Observatory 
Network

Home/Cell: (724) 272-7769
Work: (720) 836-2488

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--

Thomas E Adams
National Weather Service
Ohio River Forecast Center
1901 South State Route 134
Wilmington, OH 45177
EMAIL:  thomas.adams at noaa.gov
VOICE:  937-383-0528
FAX:    937-383-0033

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