[R] x[0]: Can '0' be made an allowed index in R?
Ben Bolker
bbo|ker @end|ng |rom gm@||@com
Sun Apr 21 16:23:50 CEST 2024
Also https://cran.r-project.org/package=Oarray (which is older and
hence possibly more stable)
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.
>
> [[alternative HTML version deleted]]
>
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