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arthanzel / evaluatex

Latex and ASCIIMath evaluator for Javascript.
http://arthanzel.github.io/evaluatex
MIT License
74 stars 16 forks source link

[Issue] LaTeX commands #1

Open tecosaur opened 5 years ago

tecosaur commented 5 years ago

First off,

This library seems great! ~80 commits, all by one person, and works really well! I don't know why this isn't getting more attention!

On a 'not quite there yet' note, despite the partial LaTeX support (the reason why I am here). There seem to be some issues with very basic functionality. See below.

>>> evaluatex('a \\times b', options={latex: true})
Thrown: Parsing error: Expected end of input, but got COMMAND undefined

I haven't done any sort of entensive testing yet, but I had hoped that I would be able to use this to make a VS Code extension that evaluates lines of math in LaTeX code. I still hope I will, since this seems to have all the groundwork done, but would be all the better for an extra few steps :grin:

arthanzel commented 5 years ago

Thanks for the positive feedback! Unfortunately, I haven't given LaTeX the love it deserves. I've mostly been using Evaluatex with ASCIIMath because it fit my use case at the time.

The times LaTeX command is not implemented yet. I suspect you could implement it by adding the appropriate code in util/localFunctions.js and util/arities.js, or by modifying the lexer to replace the \\times command token with a multiplication token, since they're semantically equal.

I would also welcome a PR containing a diverse set of test cases for LaTeX math. If there's enough new features to make it worth my time, I'd consider diving into this project again.

LennyLip commented 4 years ago

Rich converter from LaTex to sympy https://github.com/jackatbancast/latex2sympy/ . This can help.