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2024 Dec 10
1
Faster downloads: avoid them if possible
On 12/10/24 00:35, Llu?s Revilla wrote:
> Dear R-devel,
>
> I read with interest the recent blog post on how R will have parallel
> downloads, on blog.r-project.org
> (https://blog.r-project.org/2024/12/02/faster-downloads/index.html).
> Thanks Tomas!
>
> The blog mentions that one of the areas where this will be observed is
> while installing them (which I did!).
2009 Dec 04
1
multidimensional point.in.polygon??
...auguie
said "one general way to do this would be to compute the convex hull
(?chull) of the augmented set of points and test if the point belongs to
it"; an approach I'd considered generalising to multiple points thus (pseudo
R code)...
----------------
baseHull <- convhulln(baseSet)
augHull <- convhulln(augSet)
while (augHull != baseHull)
{ augSet <- augSet [-(augHull !%in% baseHull)]
augHull <- convhulln(augSet)
}
--------------------
... but this has that horrible loop including a convhulln!
In the (real, typical) test data set I'm using...