While I certainly think using negative indices to denote element exclusion is a
cool feature, I think people wanting to use zero-based indexes probably are not
planning to use that feature. Python uses negative numbers to index from the
end, which is a completely different use of negative indexes with the exclusion
feature that R users just happily ignore. It is only the possible surprise that
exclusion doesn't work consistently that is relevant here.
I would hope that uses of alternate indexing schemes in most packages be
wrapped inside functions as much as possible so that R users don't have to get
dragged into this paradigm shift to make use of those algorithms.
On April ,
>> 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
>>>>
>>>> --
>>>> Honorary Research Fellow
>>>> Department of Statistics
>>>> University of Auckland
>>>> Stats. Dep't. (secretaries) phone:
>>>> +64-9-373-7599 ext. 89622
>>>> Home phone: +64-9-480-4619
>>>>
>>>> ______________________________________________
>>>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>>>> https://stat/
>>>> .ethz.ch%2Fmailman%2Flistinfo%2Fr-help&data=05%7C02%7Ctebert%40ufl.edu
>>>> %7C79ca6aadcaee4aa3241308dc62d986f6%7C0d4da0f84a314d76ace60a62331e1b84
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>>>> PLEASE do read the posting guide
>>>> http://www.r/
>>>> -project.org%2Fposting-guide.html&data=05%7C02%7Ctebert%40ufl.edu%7C79
>>>> ca6aadcaee4aa3241308dc62d986f6%7C0d4da0f84a314d76ace60a62331e1b84%7C0%
>>>> 7C0%7C638493933686711061%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiL
>>>> CJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=AP78X
>>>> nfKrX6B0YVM0N76ty9v%2Fw%2BchHIytw33X7M9umE%3D&reserved=0
>>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>> --
>>> 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
>>>
>>> ______________________________________________
>>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide http://www.r-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>> ______________________________________________
>>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>
>> --
>> 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
>>
>> ______________________________________________
>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
>______________________________________________
>R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
--
Sent from my phone. Please excuse my brevity.
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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