Re: [R] Merging two data set in R,

try the following "merge" command. merge(A,B, by = intersect(names(A), names(B)), all.x=FALSE, all.y=FALSE) or merge(A,B, by = "ID", all.x=FALSE, all.y=FALSE) Dannemora On Wed, Aug 25, 2010 at 5:35 AM, Mangalani Peter Makananisa < pmakanan...@sars.gov.za> wrote: > Dear R Gurus, > > > > I am cur

Re: [R] Extracting formulae from expression() / deriv()

On Tue, Apr 6, 2010 at 9:09 AM, nickymcp https://stat.ethz.ch/mailman/listinfo/r-help>> wrote: >* *>* I am attempting to extract the derivative/ gradient from this expression *>* *>* df1p <- deriv(f1, "P") *>>* df1p *>* expression({ *>*.value <- s - c - a * P *>*.grad <- array(0, c(length(.