[Rd] weigths in nls (PR#13991)

[Kjetil Halvorsen]

see below.

On Fri, Oct 9, 2009 at 1:35 PM, Tony Plate <tplate at acm.org> wrote:
> This is expected behavior from the way nls() is written.  The nls() function
> has a "..." argument, which means that additional arguments are allowed.
>
> Under "Arguments" the docs say:
> |...|   Additional optional arguments. None are used at present.
>
>
> As far as I can see in the code, nothing at all is done with the additional
> arguments (consistent with the docs).   I guess the "..." argument is there
> to allow for future development (though I'm not sure what is gained by
> including "..." as a formal argument now, and not just adding it in the
> future if and when it is needed.)

¿Maybe it allows for other people to write methods?

Kjetil


>
> In general, the use of ... arguments does add flexibility, but it takes away
> some error-checking.
>
> -- Tony Plate
>
> Stephen.Bond at cibc.com wrote:
>>
>> Potential bug:
>>
>> I mistyped weights in the call ('weigths') and it did not produce any
>> error=
>>  message. The coefs were exactly the same like without weights, so I was
>> su=
>> spicious and when weights(nls1) gave NULL, I saw my typo.
>>
>> Usually the function will say "Unused arguments", which shows you the
>> error=
>> , but not nls.
>>
>> Regards
>> Stephen
>>
>>        [[alternative HTML version deleted]]
>>
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>
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