On Jun 12, 2005, at 3:21 PM, Gabor Grothendieck wrote:
> On 6/12/05, Liaw, Andy <[EMAIL PROTECTED]> wrote:
>
>> I don't get the point. ?by says:
>>
>
> The point is that all other functions of this sort including apply,
> sapply,
> tapply, lapply work like that so 'by' ought to as well.
>
> Here is the example (changed to use iris) where I noticed it.
> Suppose we
> want to create a list of rows:
>
> by(iris, row.names(iris), "(")
Umm.. why don't you just use
by(iris, row.names(iris), `(`)
In general I consider passing functions as text unnecessary - the
only use I could think of is constructing function names from strings/
data and I'm not sure that is a good idea, either (it causes quite
some performance issues) ... just my 2 pennies ...
Cheers,
Simon
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