Hans,
Both your methods worked great! They was exactly what I was looking for.
I ended up using the second method as it is a little more efficient:
fn2nd_fun <- function(x) eval(fn2nd, list(x=x))
ex <- seq(from=0, to=1, length.out = 1000)
y1 <- fn2nd_fun(ex)
...
r <- uniroot(fn2nd_fun, interval=c(0, 1), tol=0.0001)
Thanks,
J
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