For your first question, use the get() function
-Don
At 5:18 PM +0100 2/11/10, Philipp Rappold wrote:
Dear all,
I have two probably very easy questions:
(1) Is there a way to access certain variables by their string-based
name representation?
Example:
numbers <- c("one", "two", "three")
varname <- "numbers"
print(varname[2])
(2) I need this functionality for a customized na.exclude() function
that I am building, which should only exclude rows that have NA in
certain columns. Maybe there is already a function which does
exactly what I need, so I'd highly appreciate if someone could point
me there ;)
My current implementation looks like this:
naexlcude <- function(data, varnames)
{
for(v in varnames){
data = subset(data, !is.na(v))
}
data
}
Best
Philipp
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--
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA
925-423-1062
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