I'd tried
histogram =: <: @ (#/.~) @ (i. @#@[ , I.)
histogram1=: <: @ (#/.~) @ (i.@>:@#@[ , I.)
freqcount from stats addon
and another one copied from mailing list, lost to time.
I hadn't tried #/.~ , found in the Reflexive phrases page which shows up on the
search, which makes me look silly now.
Thanks for the quick response.
Sep 12, 2022, 08:10 by elro...@elronnd.net:
> It would be helpful to know what code you were using that was not working on
> symbols and boxes. One quick solution is x ({.,#)/. i.#x; that gives a
> two-column table whose first column gives indices and whose second column
> gives the count of elements at the corresponding index. Faster is to
> separate #/.x and I.@:~:x, building the index and length lists separately.
>
> Assuming you do not care about the content of the words, you may find it
> convenient to create a dictionary of words encountered, and then represent
> each word with its index in the dictionary.
>
>> +/|:= and tying that to the nub somehow
>>
>
> That should work. I would use +/"1=y rather than +/|:=y. The result is a
> frequency count for each element of the nub; no extra mapping required.
>
> -E
>
> On Mon, 12 Sep 2022, 'Viktor Grigorov' via Programming wrote:
>
>> Hey,
>>
>> Whilst getting back to a Markov text generator in J, I quickly came to the
>> issue of all top-result verbs for histograms, found querying the wiki and
>> the mailing lists, to be dealing with numeric types only. One'd have to
>> reshape the items appropriately to a new dimension. But if one has n-tuples
>> of words, what then? The verbs give domain errors on symbols and boxes.
>>
>> Obviously, I. can't be used, and something long would just be
>> ill-performant, like +/|:= and tying that to the nub somehow. What would
>> work with symbols, boxed strings, or rank 2 array? What would work well? A
>> typical novel is 8e4 +- 2e4, that's a lot of tuples, and my idea is to
>> employ 3-, 4-, and 5-length groupings, just to compare results with
>> different settings. I've dealt little-to-not-at-all with symbols, and boxed
>> strings,
>>
>>
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>>
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