David and Marc, thanks, both your answers work for me.
all.vars() is ideal for me as I can get a vector of characters which I can use as argument of deriv() to get a vector of derivatives of an expresssion for all its variables. On Wed, Jun 16, 2010 at 12:28 AM, Marc Schwartz <marc_schwa...@me.com> wrote: > On Jun 15, 2010, at 5:07 PM, David Winsemius wrote: [...] Greetings, -- Alberto ______________________________________________ R-help@r-project.org 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.
