Whoops. Looks like I got here too late.
Well done!
Louis
> On 28 Apr 2016, at 00:29, Louis de Forcrand wrote:
>
> The three-item form is used if the associated function is ambivalent (applied
> to the P-cells of ⍵ if monadic, applied to corresponding Q-cells of ⍺ and
> R-cells of ⍵ if dyadic)
The three-item form is used if the associated function is ambivalent (applied
to the P-cells of ⍵ if monadic, applied to corresponding Q-cells of ⍺ and
R-cells of ⍵ if dyadic). I don't believe it is possible to define ambivalent
functions in ISO APL however, so it is kind of redundant. It is pro
Most operators which seem alien to APL2-like APLs are mostly taken from Sharp
APL and J (key, rank, and even enclosing, although it and the power operator
behave quite differently). Therefore you can find quite good info (except for
the lack of the corresponding symbol) in the J dictionary:
http
Hi,
thanks, fixed in SVN 724.
/// Jürgen
On 04/26/2016 01:41 PM, Jay Foad wrote:
I agree that this seems like a bug. Your example works in NARS2000 and
Dyalog. To make it work in GNU APL I currently have to do an extra
enc
Hi Fred,
thanks, fixed in *SVN 724*.
/// Jürgen
On 04/26/2016 05:28 PM, Fred Weigel wrote:
A defect was introduced in revision 722.
In libapl.cc, line 410, a parameter "false" should be added.
FredW
Incidentally, it works like this in Dyalog and NARS2000 too, though
the Dyalog documentation doesn't mention the 3-item form.
Jay.
On 27 April 2016 at 09:02, Jay Foad wrote:
> Given g ← f⍤P Q R:
> P is the monadic rank
> Q is the left rank
> R is the right rank
>
> So:
> g Y applies g to the P-c
Thanks, that's interesting.
However, I'm still a big confused about the 3-value case. When is P, Q and
R all used?
Secondly, do you agree that that negative ranks would be useful?
Regards,
Elias
On 27 April 2016 at 16:02, Jay Foad wrote:
> You're reading section 9.3.4 "Rank operator deriving
You're reading section 9.3.4 "Rank operator deriving monadic
function". You also need to look at 9.3.5 "Rank operator deriving
dyadic function".
Given g ← f⍤P Q R:
P is the monadic rank
Q is the left rank
R is the right rank
So:
g Y applies g to the P-cells of Y
X g Y applies g to the Q-cells of
Dyalog supports the use of a negative rank parameter, while GNU APL does
not. Instead GNU APL follows the ISO spec which says that a negative value
should be clamped to 0.
However, the Dyalog model is quite useful. Here's how it's described in
their documentation:
*“The Rank operator ⍤ 1 applies
