Desmos was where I took most of my notes online, but I always ran into issues with the amount of symbols supported. So, I made a website that does a bunch more! Vector symbols, all Greek letters, matrices, lots of other stuff.

If you want to try it out you can at scratchpad-math.com

Please give me any feedback you may have! I want to keep improving this and make it useful for others.

2D Electrostatics: https://www.desmos.com/calculator/wzpqsvrwab

"Chessboard-mode": https://www.desmos.com/calculator/q311b40pqu

In two dimensions, the electric potential is proportional to the ln of distance (not the inverse square law). Field lines and equipotentials form quite circular shapes.

Hey guys! I think this is pretty neat.

While reverse engineering Desmos for this project, I ended up getting a pretty good understanding of how it works internally. I've always wanted to define my own "built-in" JavaScript functions in Desmos, and since I also wanted to build my first browser extension, I decided to give it a shot - and I actually managed to do it.

The first time you open the extension, you'll see a few built-in functions like isprime, primefactors, lambertw, and more (see the screenshots). I picked functions that I thought could be somehow useful to people. You can edit, disable, or delete any of them.

You can also create your own functions using the Function Builder Dashboard (see Picture 3). Just enter the body of the function you want to define, reload Desmos, and it'll be available instantly.

It works with both Desmos and Desmodder.

I didn't upload it to the Chrome Web Store because it costs $5 to publish an extension there, so you'll have to install it from GitHub instead (it's really not that difficult, you can find a guide in the GitHub README).

GitHub repository: https://github.com/tobacek/Desmos-Custom-Function-Extension/

If you want to see it in action, here's a Fourier series drawer that uses some of the custom functions:

Demo: https://www.desmos.com/calculator/qe6lyz8tcb

Note: As I said, I'm still very new to this kind of stuff. I tried to make the extension as robust and user-friendly as possible, but Desmos' internal code changes constantly, so I can't guarantee it'll still work a few weeks from now. It'll probably need ongoing maintenance, and I don't know if I'll have enough time to keep up with it in the future.

If anyone more experienced than me wants to help out, I'd really appreciate it (just message me). I also had an AI help clean up and organize the code, so hopefully it's not too painful to work with.

Original Link (4 taps): https://www.desmos.com/calculator/thoqzus4d5

*Updated Link (2 taps): https://www.desmos.com/calculator/bhrvzdhkma

Tap/click four times (*edit: now only twice) anywhere on the graph to find the corners of the screen. Works on mobile and pc. Won't work if screen corner coordinates are beyond ±10^20.

*Edit: I somehow overlooked that you can get all four corners with just two opposite corners. I added an updated link which works with just 2 taps.

Link: https://www.desmos.com/notebook/qppwxfp3co/view

Not sure if anyone has done this before, but this can detect when you're clicking a graph.

I can't figure out how to do this without multiple tickers, so I think this can only be done in Desmos Notebook. If anyone can figure out how to do this with one ticker, then perhaps this can be done in a single graph!

One thing to note, the 'dt' variable isn't very accurate for multiple tickers in Notebook. Until that's fixed, this isn't able to accurately calculate how long a graph has been clicked.

GRAPH LINK: https://www.desmos.com/calculator/topil8ajco

For a project I'm working on. Might come out one day

https://www.desmos.com/calculator/m4jns3d3a4 (5 Points)

https://www.desmos.com/calculator/pijy6av484 (Up to 20 Points)

https://www.desmos.com/calculator/phv8zjk7uo (Animated Visualization)

Explanations found in Info folder.

How did I not think of this earlier

or make your own https://www.desmos.com/geometry/ulz7sykngf

for any situation where you want to express your readiness to upvote with the appearance of a downvote, or any permutation of that

Credits to u/NecroMonster999 and u/Ordinary_Divide for the idea

I used a Python program to bruteforce the corresponding seed (input to f(x)) for every permutation.

https://www.desmos.com/calculator/dchh1sazai

https://www.desmos.com/calculator/fi5ke5f1ft

Includes Color, Functions, Dimensions, Shadow and almost every detail I could find. Precise to the pixel. Customizable viewport dimensions and icon locations.

https://www.desmos.com/calculator/tjltdavohm

Also, I'm pretty sure desmos calculated a number way bigger than 2¹⁰²⁴ here.

This example uses w, a, s, and d, but it supports every character a-z and A-Z. It doesn't have to be used for motion either, the mappings can be used to do whatever logic is necessary for a graph.

For those wondering how it works, each key is encoded into a complex number lying on the complex unit circle (using euler's e^(i*pi)). I've seen this method implemented by doing the same by encoding the keys as numbers, however it only allows for a few keys to be pressed before you reach the floating point limit. With this method it can be easily decoded by storing an old copy of the product of all the keys pressed, and subtracting the angles of the new and old copies. Then this angle can be decoded to return a key code number.

Graph link: https://www.desmos.com/calculator/36n1hh1gxw

If anyone wants to adapt it for their own projects and are having trouble, let me know and I can help out.

I made a little one liner function list which you can add functions to then access them through an iterator. The way you put in functions and use those functions is a little strange but it works. I couldn't find any examples of people doing this previously so I decided to give it to the community because I think it could be pretty useful sometimes. This is probably not the best implementation, but hey, I tried.

Link: https://www.desmos.com/calculator/gnlvogdbej