Re: [Rd] proposed change to 'sample'

From: Peter Dalgaard <pdalgd_at_gmail.com>
Date: Mon, 21 Jun 2010 08:57:33 +0300

Hadley Wickham wrote:

>> I would be more inclined to make sampling from a vector the normal case,
>> and default x to say 1:max(n, size), forcing users to say sample(n=5) if
>> sampling from x=1:5 is desired. This could be a manageable change; the
>> deprecation sequence is a bit painful to think through, though.

>
> Don't we already have sample.int for that case?
>
> Hadley
>

For the 2nd case, yes, but I was aiming at getting sample(x) == x[sample.int(length(x))] also in the length 1 case, removing the ambiguity. This would obviously break some code, but I'd expect not all that much. However, it cannot be changed in one go, we'd need to go through a sequence where we (e.g.)

  1. warn about length(x)==1
  2. say that length(x)==1 is deprecated
  3. have length(x)==1 throw an error
  4. wait....
  5. give length(x)==1 a new meaning
-- 
Peter Dalgaard
Center for Statistics, Copenhagen Business School
Phone: (+45)38153501
Email: pd.mes_at_cbs.dk  Priv: PDalgd_at_gmail.com

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