Thinking about it, I should have said: simplifying explicit ranks.
On 18-06-13 04:16, Michal D. wrote:
Hi,
I'm not quite sure what you mean by "reducing explicit ranks" - could you
elaborate?
Cheers,
Mike
On Mon, Jun 17, 2013 at 1:25 AM, Aai <[email protected]> wrote:
Same results can be obtained by reducing explicit ranks.
(2 2$0 1 100 0) ([;];* ;*"1 2; *"1;*"1 1"1 2) 1+i.2 2 2
┌─────┬───┬───────┬───────┬───**──┬─────┐
│ 0 1│1 2│ 0 0│ 0 0│ 0 2│ 0 2│
│100 0│3 4│ 3 4│ 3 4│ 0 4│ 0 4│
│ │ │ │ │ │ │
│ │5 6│500 600│500 600│500 0│500 0│
│ │7 8│ 0 0│ 0 0│700 0│700 0│
└─────┴───┴───────┴───────┴───**──┴─────┘
On 16-06-13 20:59, Michal D. wrote:
Hi All,
Here's an interesting behaviour I came across while trying to implement a
J
interpreter - the behaviour of nested ranks. It turns out that using "
actually does not modify the rank of the underlying verb but adds another
wrapper in how it is applied.
Note that (1) and (2) below produce different results.
box2 provides an easier way to visualize what arguments a verb is applied
to.
Mike
---
] y=:2 2 $ 0 1 100 0
0 1
100 0
] z =: 2 2 2 $ 1+i. 100
1 2
3 4
5 6
7 8
y *"1 2 z NB. (1)
0 0
3 4
500 600
0 0
y (*"1 1)"1 2 z NB. (2)
0 2
0 4
500 0
700 0
box2=: (<@:[),(<@:])
y box2"1 2 z
+-----+---+
|0 1 |1 2|
| |3 4|
+-----+---+
|100 0|5 6|
| |7 8|
+-----+---+
y (box2"1 1)"1 2 z
+-----+---+
|0 1 |1 2|
+-----+---+
|0 1 |3 4|
+-----+---+
+-----+---+
|100 0|5 6|
+-----+---+
|100 0|7 8|
+-----+---+
------------------------------**------------------------------**
----------
For information about J forums
seehttp://www.jsoftware.com/**forums.htm<http://www.jsoftware.com/forums.htm>
--
Met vriendelijke groet,
@@i = Arie Groeneveld
------------------------------**------------------------------**----------
For information about J forums see
http://www.jsoftware.com/**forums.htm<http://www.jsoftware.com/forums.htm>
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
--
Met vriendelijke groet,
@@i = Arie Groeneveld
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
