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2023 Dec 19
1
Partial matching performance in data frame rownames using [
...ic
O(N^2) whereas the other approaches are asymptotically faster: linear
O(N) or log-linear O(N log N).
I think that accepting Ivan's pmatch.rows patch would add un-necessary
complexity to base R, since base R already provides an efficient
work-around, d1[match(q1,rownames(d1)),]
I do think the CheckUserInterrupt patch is a good idea, though.
Best,
Toby
On Sat, Dec 16, 2023 at 2:49?AM Ivan Krylov <krylov.r00t at gmail.com> wrote:
>
> On Wed, 13 Dec 2023 09:04:18 +0100
> Hilmar Berger via R-devel <r-devel at r-project.org> wrote:
>
> > Still, I feel that default partial matchin...
2023 Dec 16
2
Partial matching performance in data frame rownames using [
On Wed, 13 Dec 2023 09:04:18 +0100
Hilmar Berger via R-devel <r-devel at r-project.org> wrote:
> Still, I feel that default partial matching cripples the functionality
> of data.frame for larger tables.
Changing the default now would require a long deprecation cycle to give
everyone who uses `[.data.frame` and relies on partial matching
(whether they know it or not) enough time to