On 29/03/17 11:03, William Dunlap wrote:
I think that the suggestion I made, in response to a posting by
Barry Rowlingson, that the first argument of lapply() be given the name of
".X" rather than just-plain-X, would be (a) effective, and (b) harmless.
It would break any call to *apply() that
>I think that the suggestion I made, in response to a posting by Barry
>>Rowlingson, that the first argument of lapply() be given the name of ".X"
>rather >than just-plain-X, would be (a) effective, and (b) harmless.
It would break any call to *apply() that used X= to name the first
argument. T
On 28/03/17 15:26, Charles C. Berry wrote:
On Mon, 27 Mar 2017, Rolf Turner wrote:
From time to time I get myself into a state of bewilderment when using
apply() by calling it with FUN equal to a function which has an
"optional" argument named "X".
E.g.
xxx <- lapply(y,function(x,X){cos(x
Thank you gents, I overlooked the subtle differences.
On Tue, Mar 28, 2017 at 2:49 PM, Lukas Stadler
wrote:
> “typeof” is your friend here:
>
> > typeof(`[`)
> [1] "special"
> > typeof(mc[[1]])
> [1] "symbol"
> > typeof(mc2[[1]])
> [1] "special"
>
> so mc[[1]] is a symbol, and thus not a primiti
“typeof” is your friend here:
> typeof(`[`)
[1] "special"
> typeof(mc[[1]])
[1] "symbol"
> typeof(mc2[[1]])
[1] "special"
so mc[[1]] is a symbol, and thus not a primitive.
- Lukas
> On 28 Mar 2017, at 14:46, Michael Lawrence wrote:
>
> There is a difference between the symbol and the function
There is a difference between the symbol and the function (primitive
or closure) to which it is bound.
This:
mc2 <- as.call(list(`[`,iris,2,"Species"))
Evaluates `[` to its value, in this case the primitive object, and the
primitive itself is incorporated into the returned call.
If you were to d
Dear,
I have noticed this problem while looking at the following question on
Stackoverflow :
http://stackoverflow.com/questions/42894213/s4-class-subset-inheritance-with-additional-arguments
While going through callNextMethod, I've noticed the following odd
behaviour:
mc <- call("[",iris,2,"Spe
