Dear R developers, I'm a former APL programmer. In that language, the "take" (up arrow) and "drop" (down arrow) operators were extensively used to, well, take and drop elements of vectors. Functions head() and tail() are equivalents in R for the "take" operator, but nothing seems to mimic the "drop" operator. I think it would be useful.
For example, is there any simpler way to extract all elements of a vector but the last one than doing > x[1:(length(x) - 1)] ? An equivalent of "drop" would make this easy. Now, I think this could be easily implemented with the existing functions by allowing negative arguments to head() and tail(). For example, > head(x, -1) would drop the first element of a vector and > tail(x, -length(x)) the last one. Is there any interest for such an extension? I would be very willing to contribute a patch, although I don't have much experience in doing so. Best regards, -- Vincent Goulet, Associate Professor École d'actuariat Université Laval, Québec [EMAIL PROTECTED] http://vgoulet.act.ulaval.ca ______________________________________________ R-devel@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
