Ahhh, it is the output that generates the limit error,
$ pair6a 10000 NB. works.
On Fri, Nov 7, 2008 at 8:01 PM, Matthew Brand <[EMAIL PROTECTED]> wrote:
> Thanks guys, It just goes to show there is always more than one way to
> skin a cat!
>
> I am using it on a few thousand items so the speed up is greatly appreciated.
>
> ts=: 6!:2, 7!:[EMAIL PROTECTED]
> ts 'pair6a 4000'
> 0.330374 1.3422e8
> ts 'pairi 4000'
> 11.4952 4.02654e8
>
> Does anyone know why there is a limit error for pair6a 10000 but not
> when inside ts? Is there a way to use ts and get it to spit the answer
> out?
>
> ts 'pair6a 10000'
> 2.03573 1.07374e9
> pair6a 10000
> |limit error
>
>
>
> On Fri, Nov 7, 2008 at 7:14 PM, Roger Hui <[EMAIL PROTECTED]> wrote:
>> My favorite solution is Arie Groeneveld's pair3, but there
>> is a faster and leaner solution:
>>
>> pair6a=: 3 : 0
>> t=. ((2!y),2)$0 1+0
>> t=. (1,.-.(-i.)y-2) (}:+/\(-i.)y-1)}t
>> +/\t
>> )
>>
>> pair3=:[:;<@({.,.}.)[EMAIL PROTECTED]
>>
>> (pair3 -: pair6a) 1000
>> 1
>> ts=: 6!:2 , 7!:[EMAIL PROTECTED]
>>
>> 10 ts 'pair3 1000'
>> 0.0356751 9.63603e6
>> 10 ts 'pair6a 1000'
>> 0.0190992 8.39136e6
>>
>> Also, pair6a 1 gives a wrong answer.
>>
>>
>>
>> ----- Original Message -----
>> From: Devon McCormick <[EMAIL PROTECTED]>
>> Date: Friday, November 7, 2008 7:56
>> Subject: Re: [Jprogramming] pairs
>> To: Programming forum <[email protected]>
>>
>>> My timings agree with the ones on your clean system: "pair3" is
>>> fastest,followed by "pair2", then by "2&comb3"; all three are
>>> pretty close to each
>>> other and are much faster than the original "pairi":
>>>
>>> rnk2 100&ts&>'pairi y';'pair2 y';'2&comb3 y';'pair3
>>> y' [ y=. 1000
>>> 3 29.78 2.61 0.484 2.517e7
>>> 1 1.17 1.00 0.019 9.640e6
>>> 2 1.20 1.00 0.020 9.636e6
>>> 0 1.00 1.00 0.016 9.636e6
>>>
>>> On Fri, Nov 7, 2008 at 10:28 AM, R.E. Boss
>>> <[EMAIL PROTECTED]> wrote:
>>>
>>> > On a cleaner system I get
>>> >
>>> > rnk2 5&ts&>'pair2 y';'2&comb3 y';'pair3 y'[y=.5000
>>> > 1 1.04 1.00 0.737 2.834e8
>>> > 2 1.11 1.00 0.791 2.833e8
>>> > 0 1.00 1.00 0.711 2.833e8
>>> >
>>> > rnk2=: 1 7j2 5j2 10j3 8j_3 ": (,.~[: (/:@/:@:({."1) ,. }."1) (%"1
>>> > <./)@:(,.~
>>> > */"1))
>>> NB. wrap around!
>>> >
>>> >
>>> > R.E. Boss
>>> >
>>> >
>>> > -----Oorspronkelijk bericht-----
>>> > Van: [EMAIL PROTECTED]
>>> > [mailto:[EMAIL PROTECTED] Namens Arie Groeneveld
>>> > Verzonden: vrijdag 7 november 2008 16:25
>>> > Aan: Programming forum
>>> > Onderwerp: Re: [Jprogramming] pairs
>>> >
>>> > I executed both lines, having different arguments, several times,
>>> > because I didn't get the same result as RE.Boss timings.
>>> >
>>> > 5j2": (%"1<./) 5&(6!:2)&>'pairi ry';'pair2
>>> ry';'2&comb3 ry'[ry=.1000
>>> > 34.34 1.00 1.04
>>> >
>>> >
>>> > Devon McCormick schreef:
>>> > > This looks like the usual variability of timing few
>>> iterations. If you
>>> > try
>>> > > this with 100 iterations, i.e.
>>> > >
>>> > > 5j2": (%"1<./) 100&(6!:2)&>'pair2
>>> ry';'pair3 ry' [ry=.25
>>> > >
>>> > > your results should be more stable.
>>> > >
>>> > > On Fri, Nov 7, 2008 at 9:38 AM, Arie Groeneveld
>>> <[EMAIL PROTECTED]>> wrote:
>>> > >
>>> > >
>>> > >> However....
>>> > >>
>>> > >> Executing the following two lines several times (sometimes
>>> I get erratic
>>> > >> results):
>>> > >>
>>> > >> 5j2": (%"1<./) 5&(6!:2)&>'pair2 ry';'pair3
>>> ry' [ry=.25
>>> > >> 1.00 1.34
>>> > >>
>>> > >> 5j2": (%"1<./) 5&(6!:2)&>'pair2 ry';'pair3
>>> ry' [ry=.1000
>>> > >> 1.02 1.00
>>> > >>
>>> > >>
>>> > >> Arie Groeneveld schreef:
>>> > >>
>>> > >>> Slower , but more concise
>>> > >>>
>>> > >>> pair3=:[:;<@({.,.}.)[EMAIL PROTECTED]
>>> > >>>
>>> > >>>
>>> > >>> Arie Groeneveld schreef:
>>> > >>>
>>> > >>>
>>> > >>>> pair2=:([:;],."0 _&.>[:<\.1&+)@i.@<:
>>> > >>>>
>>> > >>>> (pair2-:pairi) 100
>>> > >>>> 1
>> ----------------------------------------------------------------------
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>>
>
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