[R] index range
ggrothendieck at gmail.com
Tue Feb 19 01:01:01 CET 2008
On Feb 18, 2008 6:52 PM, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:
> You can define origin 0 objects yourself if you like.
> Here is a partial implementation:
> "[.orig0" <- function(x, i)
The 0 should be a 1.
> if (is.numeric(i)) .subset(x, i+0) else .subset(x, i)
> orig0 <- function(x)
> structure(x, class = c("orig0", setdiff(class(x), "orig0")))
> x <- orig0(1:5)
> x[0:3] # 1:4
> Note that usually 0 means leave out that element in R and
> in this implementation -1 means leave it out. Also normally
> -3 mean leave out 3rd element but in the implementation
> above -0 would be 0 so it would give the first element.
> Probably best to just get used to the R way.
> On Feb 18, 2008 6:31 PM, hill0093 <hill0093 at umn.edu> wrote:
> > It looks to me like the index range starts at 1 in R.
> > Is this true?
> > If so, is there a way to change it to start at 0?
> > That way, I wouldn't have to make so many
> > changes when I translate a function from
> > another language.
> > --
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