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10:17 AM
I have been working on a tutorial for working with trees, aimed at late-beginner/early-intermediate APLers. hopefully some people here find it helpful! constructive feedback is also appreciated
@RubenVerg Yes.
 
4 hours later…
2:03 PM
@asherbhs A great resource, neatly explained. Does this representation extend to graphs?
2:33 PM
is there a library function for doing eigenvalues and eigenvectors?
2:54 PM
@xpqz Thank you! You can kind of use this representation for graphs. You'd have to store a vector of 'parents' for each node, at which point you have a kind of backwards adjacency list. If I have the opportunity I'd like to make a similar resource for graphs as well :)
3:46 PM
@Adám to not have to bother you everytime i publish a post, can i make prs to the apl.news repo? i guess that's just bothering you in a different way though(:
@RubenVerg (and as per above don't really want to bother you with this but could you add ^?)
3:58 PM
@RubenVerg Yes you can pr, which did save me work. Just edit index.html and run the repo.
4:09 PM
@asherbhs A graph library like Python's NetworkX (networkx.org) but with array powers would be very useful. If you have spare time :)
4:33 PM
i get libva error: vaGetDriverNameByIndex() failed with unknown libva error, driver_name = (null) everytime i start dyalog, also crashes when i run Run from apl.news, idk if they're related
i'll try on the other machine
no, crash on Windows too
both 19.0 and 18.2
...nevermind
it just does ⎕off so it looks like it didn't work
there, made a pr
4:55 PM
what's the intended way to call it where ⎕off makes sense?
5:44 PM
@xpqz I've thought quite a lot in the past about making something like this. I think sparse matrices may be the path forward with it, that way we could keep some of elegance of the transitive closure idiom ((∨.∧⍨∨⊢)⍣≡) and algorithms like it, without the quadratic complexity
6:02 PM
@RubenVerg Not sure what you're asking, but from Windows, simply right click on it in the folder and choose Run with Dyalog. On other platforms, do dyalog LOAD=path/to/apl.news
6:44 PM
ah, i ran it with ]link.create, so it seemed weird that it quit and it looked like it crashed, if it was intended to run standalone it makes more sense

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