On Sep 21, 2010, at 10:11 PM, Adrienne Wootten wrote:
R-listers,
I'm working on a project where I need to get the lowercase of the
county
variable in a dataset alike to the example below (only difference is
that
the full dataset has all the states and counties in the southeast
United
States). I keep getting this strange error with the lowerize function
(which didn't occur the first few times I use the code below), and
oddly
enough the error doesn't happen with the function CapLeading (which
is in
the same package).
correlfile[1:3,]
state statecounty county
1 AL AL_AUTAUGA AUTAUGA
2 AL AL_BALDWIN BALDWIN
3 AL AL_BARBOUR BARBOUR
library(cwhmisc)
On the basis of my initial testing I suspect that these are character
vectors rather than factors. If you could produce the results of dput
on a larger number of rows it might be helpful.
Another thought would be to replace the "=" operator with "<-"
The "=" behavior can occasionally be unpredictable. (I repeated the
operation of the rhs of that assignment 1000 times inside a replicate
call and did not trigger an error with that tiny dataset after reading
it in with stringsAsFactors =FALSE.
I also wonder why it was necessary to make a new function that does
the same thing as the tolower() function, and I wonder if you might
substitute a base function for this flakey function?
traceback immediately after the error might also be informative.
R 2.9 is getting pretty old (2 years?) and you should check to see if
upgrading to a current version of R and cwhmisc will solve the
problem. (We are getting ready for R 2.12 at this point.)
--
David.
correlfile$county[correlfile$state=="AL"]=lowerize(correlfile
$county[correlfile$state=="AL"])
Error in get(as.character(FUN), mode = "function", envir = envir) :
object 'f' of mode 'function' was not found
correlfile$county[correlfile$state=="AL"]=CapLeading(correlfile
$county[correlfile$state=="AL"])
System specs involved
R version 2.9.2
cwhmisc package version 2.1
OS - Redhat Enterprise Linux version 5.5
Another strange thing that seems to happen is that when I open R in a
different working directory of the server, the lowerize function works
without giving this error, for a short while. Before long, it
begins giving
the aforementioned error message again.
I haven't found anything in the archives on this so I turn to the R-
listers.
Any ideas on why this keeps happening would be very helpful!
Thanks!
Adrienne Wootten
Graduate Research Assistant
State Climate Office of North Carolina
North Carolina State University
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