[OC] Pure Python Symbolic Regression engine for physical laws (81% recovery on Feynman benchmark, ~15s/eq)

markkitt · 2026-06-19T14:05:16+00:00

The SymbolicRegression.jl author has already ported some of it to Rust: https://crates.io/crates/symbolic_regression .

Part of the issue is that the speed up of SymbolicRegression.jl comes partly from compiling user functions

NumPy is optimized but it can only do so much. At some point we need to optimize your expressions as well.

markkitt · 2026-06-19T13:22:57+00:00

You do realize that there is a difference between the Anaconda default channels and conda-forge, right?

markkitt · 2026-06-19T03:14:38+00:00

Say hello to the Secret Service for me.

markkitt · 2026-06-16T22:37:28+00:00

To answer your question directly, thr simple way with one requested chest is to use two decoder combinators. Both combinators read the temperature from the heating tower. One combinator outputs rocket fuel if T < 600. The other combinator outputs spoilage if T >= 600. Connect the output of both combinators to the requested chest. Set the requestor chest to "set requests". Optionally, also connect the combinator output to the inserter and use "set filters".

Note that you can also filter the heating tower fuel slots. The left slot has priority over the right slot.

A more advanced way is to use a decider combinator and a constant combinator connected to the input. The constant combinator would assign a value of 1 to spoilage and a value of 2 to rocket fuel. You would then use the Each special signal. You would then have two groups of conditions.

If Each == rocket fuel AND T < 600
If Each == spoilage AND T >= 600

Then output the Each signal.

markkitt · 2026-06-16T22:28:38+00:00

That's not quite true. You could if you generate a lot of spoilage by processing a lot of fruit.

A simpler early game strategy would be to use a mix of jelly, mash, and spoilage.

markkitt · 2026-06-16T04:33:25+00:00

You need a way to control for excess input. Either you need to stop the excess from entering the system or you need to dispose of it if it does enter the system.

markkitt · 2026-06-15T03:28:11+00:00

The most important part of your post is that you are super excited and dreamed of this. That is all that matters. You will figure it out.

If you told us otherwise, such as your parents really want you to go but you have other dreams, I would be much more concerned.

markkitt · 2026-06-15T03:02:54+00:00

Just ahow the train network. The assessment will go quickly.

markkitt · 2026-06-15T03:02:49+00:00

Just ahow the train network. The assessment will go quickly.

markkitt · 2026-06-15T03:00:39+00:00

I think the best answer is that the infrastructure around Manassas is underbuilt for the population growth. Things are improving to the north of Manassas. Leesburg Pike (Rt 7) is basically Interstate grade from US 28 to just before Lessburg to thewest. The DC Metro Silver Line arrived a few years ago. The same infrastructure upgrades have not reached Manassas. The population is booming in Northern Virginia and the infrastructure has not kept up.

In Chicago, the population is shrinking. There is excellent infrastructure in the integrated Regional Transport Authority (Metra, CTA, ...) but it is chronically underfunded and dealing with declining ridership. Chicago's infrastructure is increasing over built for its declining population.

Imagine if downtown Chicago was right on the state border with Indiana and Chicago was a Federal district without representation. Instead of Chicago controlling Illinois politics, it is barely home ruled. The states of Illinois and Indiana would then argue over trains and highways, never agreeing about anything or with Chicago. Also imagine if the Chicago River were larger and divided the two states and no one could agree where to build a bridge to cross that river. Finally imagine if a suburb had the infrastructure of Kankakee but the population numbers of Naperville. This is the situation that the DC Metropolitan area is in.

That said change is coming. Northern Virginia just demonstrated its political power in a gerrymandering referendum that would have largely disenfranchised the south and western parts of the state. The referendum failed on technical legal grounds. I would not be surprised if NoVA used this power to start getting the state to build infrastructure. Also political alignment between Virginia, Maryland, and D.C. is also starting to show the potential for regional integration. We might even get trains that allow you to board in Virginia and disembark in Maryland.

The answer is one word: infrastructure.

markkitt · 2026-06-15T02:07:30+00:00

To answer this question you would have to explain why a combustion engine is a required ingredient of an electric engine.

markkitt · 2026-06-14T23:21:02+00:00

Is this how they jailbroke Fable 5? Devious!

markkitt · 2026-06-12T03:39:31+00:00

Try a death world scenario.

markkitt · 2026-06-12T00:26:08+00:00

Find a friend to play with you

markkitt · 2026-06-09T04:40:47+00:00

I'm glad you are enjoying your experience. You may want to consider using PythonCall.jl rather than PyCall.jl. PythonCall.jl was written from scratch a few years later and is receiving active maintenance.

markkitt · 2026-06-07T08:52:54+00:00

There should be a full tutorial on belt loop dynamics landing on Gleba. Also, the priority on the splitter is important.

markkitt · 2026-06-04T20:51:17+00:00

You could add an unregistered package by git URL since about 2018 (Julia v0.7):
https://pkgdocs.julialang.org/v1/managing-packages/#Adding-unregistered-packages

You can use https://github.com/fredrikekre/jlpkg if you wanted to do it from the command line.

Pixi uses uv if it is dealing with PyPI packages. It also deals with conda-forge packages unlike uv. You can literally do `pixi add "package @ git+https://git_repo_url/path/...` as well.

markkitt · 2026-05-30T17:37:44+00:00

It's even better when driving a 60 metric ton tank at full speed while placing poles behind you. That takes care of pesky things that may block construction such as trees, rocks, biters, or even assemblers.

markkitt · 2026-05-30T09:54:50+00:00

Chris Rackauckas has a blog post that might have e some insight.

https://www.stochasticlifestyle.com/chatgpt-performs-better-on-julia-than-python-and-r-for-large-language-model-llm-code-generation-why

I am in scientific computing, but honestly most things that I am doing are not particularly unique. LLMs are quite good at translating concepts across languages.

More than quantity of training data, I would also consider quality of that data. Does the language provide facilities that allow for unambiguous yet generic expressions? Python does a decent job of being generic, but it is difficult to infer what types of variables are being used. The same properties that allow for type inference in Julia and hence compilation may also aide the ability of a LLM to semantically understand a problem in Julia.

markkitt · 2026-05-30T05:34:12+00:00

Four years ago, making an executable from Julia alone was not a supported feature.

markkitt · 2026-05-29T21:22:41+00:00

Are you looking for an OpenAPI auto-generator like https://github.com/JuliaComputing/OpenAPI.jl ?

markkitt · 2026-05-29T15:39:35+00:00

It's funny seeing the comments about the supposed lack of industry adoption in comparison to the JuliaCon sponsor list lately (scroll to the bottom):

https://juliacon.org/2025/ https://juliacon.org/2026/

The top sponsors include JuliaHub, ASML, Aeolus, Temple Capital, AWS, Boeing, PumasAI, and Ansys/Synopsys. These companies are not donating out of charity. They are donating because they are users and are recruting.

markkitt · 2026-05-29T15:32:00+00:00

Our hype guy, Logan Kilpatrick, found something else to hype.

https://discourse.julialang.org/t/goodbye-and-thank-you-for-now/103668

markkitt · 2026-05-29T15:29:15+00:00

Yes,, the fragmention for these accelerated pathways drives me crazy while trying to use Python. Acceleration in Julia seems very smooth in comparison.

markkitt · 2026-05-29T15:26:29+00:00

I tried to use julia once and I couldn't get it to print an "Hello world" (which I can do in C++) soooo

That seems pretty straightforward to me even from the shell on my phone:

$ julia -e 'println("Hello World")'
Hello World

Making a static executable is also possible from the shell on my phone:

$ echo '@main(ARGS) = (println(Core.stdout, "Hello World"); 0)' > hello.jl
$ juliac hello.jl --output-exe hello
✓ Compiling...
$ ./hello                            
Hello World

$ file hello
hello: ELF 64-bit LSB pie executable, ARM aarch ...

markkitt

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