Hm, nice that, especially the intersection feature
(<2 1;1 3) { i. 4 4 NB. Select rows 2&1, columns 1&3
9 11
5 7
Maybe it's time that NewVoc was linked to the Help page in place of Voc.
Certainly would have saved me a lot of time on more than one occasion.
Will certainly be checking that first from now on...
On 29 May 2014 12:09, Henry Rich <[email protected]> wrote:
> It's in NuVoc:
>
> http://www.jsoftware.com/jwiki/Vocabulary/curlylf#dyadic
>
> Henry Rich
>
>
> On 5/29/2014 6:44 AM, alexgian wrote:
>
>> Oops, scratch that, just saw it.
>>
>>
>> On 29 May 2014 11:39, alexgian <[email protected]> wrote:
>>
>> Thanking you kindly, sir, that's a relief!
>>> Seems to work at all ranks, too.
>>> I don't think it's in the Voc (under { ), or my eyesight is getting
>>> really
>>> bad. Should be, IMHO, fairly crucial thing for an array-programming
>>> language.
>>>
>>>
>>>
>>> On 29 May 2014 11:23, Kip Murray <[email protected]> wrote:
>>>
>>> i. 4 4
>>>> 0 1 2 3
>>>> 4 5 6 7
>>>> 8 9 10 11
>>>> 12 13 14 15
>>>> (<2 1) { i. 4 4
>>>> 9
>>>>
>>>>
>>>> On Thursday, May 29, 2014, alexgian <[email protected]> wrote:
>>>>
>>>> If I want to index into a (rank 2) array to get the element usually
>>>>>
>>>> called
>>>>
>>>>> the (i,j)th in the big, bad world, is there a better way to do it than
>>>>> this, which I currently use?
>>>>>
>>>>> idx =: (1 { [) { ] {~ 0 { [
>>>>>
>>>>> 2 1 idx 4 4 $i.16
>>>>>
>>>>> 9
>>>>>
>>>>> I notice that if { takes an array as left arg, it merely returns the
>>>>>
>>>> given
>>>>
>>>>> rows of that array, rather than the required indexed element.
>>>>> So I can't do, for instance, (2 1) { 4 4 $i.16 and get what I want
>>>>> Furher, I wander if there is a more generic way of writing this so that
>>>>>
>>>> it
>>>>
>>>>> would work automatically for rank-3 arrays and greater.
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>>>>
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>>>
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