>>>>> Ben Bolker >>>>> on Sun, 21 Apr 2024 10:23:50 -0400 writes:
> Also https://cran.r-project.org/package=Oarray (which is older and > hence possibly more stable) also maintained and written by a careful and really good person. I do recommend Oarray as well. Martin BB> On 2024-04-21 3:55 a.m., Hans W wrote: >> As we all know, in R indices for vectors start with 1, i.e, x[0] is not a >> correct expression. Some algorithms, e.g. in graph theory or combinatorics, >> are much easier to formulate and code if 0 is an allowed index pointing to >> the first element of the vector. >> >> Some programming languages, for instance Julia (where the index for normal >> vectors also starts with 1), provide libraries/packages that allow the user >> to define an index range for its vectors, say 0:9 or 10:20 or even negative >> indices. >> >> Of course, this notation would only be feasible for certain specially >> defined vectors. Is there a library that provides this functionality? >> Or is there a simple trick to do this in R? The expression 'x[0]' must >> be possible, does this mean the syntax of R has to be twisted somehow? >> >> Thanks, Hans W. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.