R help - Oct 2010 - specify data frame by name

I'd like to be able to specify a data frame by name in a function call.  Any
ideas how this can be done?

dfm <- data.frame(x=1:10)

testfunc <- function(data="dfm")
{
	dat <- data
	sum(dat$x)
}

print(testfunc())

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nvm, i figured it out.


dfm <- data.frame(x=1:10)

testfunc <- function(data="dfm")
{
	dat <- eval.parent(as.symbol(data))
	sum(dat$x)
}

print(testfunc())

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