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Comment by pvitz | Hacker News Reader

I am using J on and off, but I am not aware of a ML package for it. Are you writing all algorithms yourself or could you recommend a package?

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I have a bunch of links to ML material for either APL or J. I don't know of any particular library for J. J is interpreted, so it is not as fast as other implementations. I am mainly using it to experiment on concepts and teach myself more ML in J because of the iterative nature of the REPL, and the succinct code. I can keep what's going on in my head, and glance at less than 100 lines, usually 15 lines, of code to refresh it.

There is a series of videos of learning neural networks in APL cited by others here on this thread.

Pandas author, Wes McKinney, cited J as an influence in his work on Pandas.

Extreme Learning Machine in J (code and PDF are here too):

https://github.com/peportier/jelm

Convolutional neural networks in APL (PDF and video on page):

https://dl.acm.org/doi/10.1145/3315454.3329960

A DSL to implement MENACE (Matchbox Educable Noughts And Crosses Engine) in APL (Noughts and Crosses or Tic-tac-toe):

https://romilly.github.io/o-x-o/an-introduction.html

> J is interpreted, so it is not as fast as other implementations

Which implementations are you comparing J to? To my knowledge, all of APLs, K, J are interpreted. BQN is compiled, but still very new. I also know that Dyalog was experimenting on a byte code compiler. I don't think there exists convincing benchmarks comparing those languages.

Yes, not clear on my part. I meant to other ML languages, not other array languages. It's amazing the speed you get from J as an interpreted language; it's been honed by a bunch of clever people over the last few decades.

There's a handful of resources around that look fun though I haven't dug into them yet.

There's this on the J wiki: https://code.jsoftware.com/wiki/User:Brian_Schott/code/feedf...

And there's this YouTube series for APL: https://youtube.com/playlist?list=PLgTqamKi1MS3p-O0QAgjv5vt4...

I'd also like to know. I'm considering writing some for fun in GNU APL right now.

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