One improvement. This returns a function directly without having to create a template and filling in its body:
deriv(body(f), "x", func = TRUE) On 9/3/07, Gabor Grothendieck <[EMAIL PROTECTED]> wrote: > The problem is that brace brackets are not in the derivatives table. > Make sure you don't have any. > > On 9/3/07, Alberto Vieira Ferreira Monteiro <[EMAIL PROTECTED]> wrote: > > Gabor Grothendieck wrote: > > > > > > Actually in thinking about this its pretty easy to do it without Ryacas > > > too: > > > > > > Df <- f > > > body(Df) <- deriv(body(f), "x") > > > Df > > > > > This is weird. > > > > f <- function(x) { x^2 + 2*x+1 } > > Df <- f > > body(Df) <- deriv(body(f), "x") # error > > > > Also: > > > > f <- function(x) x^2 + 2 * x + 1 > > Df <- f > > body(Df) <- deriv(body(f), "x") # ok > > D2f <- f > > body(D2f) <- deriv(body(Df), "x") # error > > > > Alberto Monteiro > > > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.