Hello Peter,
Unless I too misunderstand your point, negative indices for removal do
work with the Oarray package (though -0 doesn't work to remove the 0th
element, since -0 == 0 -- perhaps what you meant):
> library(Oarray)
> v <- Oarray(1:10, offset=0)
> v
[0,] [1,] [2,] [3,] [4,] [5,] [6,] [7,] [8,] [9,]
1 2 3 4 5 6 7 8 9 10
> dim(v)
[1] 10
> v[-1]
[1] 1 3 4 5 6 7 8 9 10
> v[-0]
[1] 1
Best,
John
On 2024-04-23 9:03 a.m., Peter Dalgaard via R-help wrote:
Caution: External email.
Doesn't sound like you got the point. x[-1] normally removes the first element.
With 0-based indices, this cannot work.
- pd
On 22 Apr 2024, at 17:31 , Ebert,Timothy Aaron <teb...@ufl.edu> wrote:
You could have negative indices. There are two ways to do this.
1) provide a large offset.
Offset <- 30
for (i in -29 to 120) { print(df[i+Offset])}
2) use absolute values if all indices are negative.
for (i in -200 to -1) {print(df[abs(i)])}
Tim
-----Original Message-----
From: R-help <r-help-boun...@r-project.org> On Behalf Of Peter Dalgaard via
R-help
Sent: Monday, April 22, 2024 10:36 AM
To: Rolf Turner <rolftur...@posteo.net>
Cc: R help project <r-help@r-project.org>; Hans W <hwborch...@gmail.com>
Subject: Re: [R] x[0]: Can '0' be made an allowed index in R?
[External Email]
Heh. Did anyone bring up negative indices yet?
-pd
On 22 Apr 2024, at 10:46 , Rolf Turner <rolftur...@posteo.net> wrote:
See fortunes::fortune(36).
cheers,
Rolf Turner
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--
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Office: A 4.23
Email: pd....@cbs.dk Priv: pda...@gmail.com
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