AI by Hand Exercises in Excel

Wow, this is extremely hard to do and shows an advanced level of mastery. Unlike in code, the computations need to be established not only conceptually but spatially. I did some very crude versions myself for a simple NN on the XOR problem prior to implementing my own NN stack on GPGPU compute shaders for Unity and used the numbers as references to make sure my calculations were correct, but my spreadsheets were no where near as beautiful or correct as these. Well done!

NN computations -- in the main -- are high school Maths. Architectures are a topology governing chains of high school Maths. This is so much the case that the building blocks can neatly be expressed in a spreadsheet, which may or may not help some people establish more mechanical sympathy for what is going on.

Ok I'm going to be the one to ask - what exactly are we looking at?

Related, I guess:

https://news.ycombinator.com/item?id=42968547

See also:

(Classical) Computer vision basics in Excel, using just formulas: https://github.com/amzn/computer-vision-basics-in-microsoft-...

Original HN Submission: https://news.ycombinator.com/item?id=22357374

PS: I am the primary author.

DeepSeek R1 in excel when?

Although this is crazy stuff, hats off to the author(s)

Only other similarly crazy thing like this I have seen recently was some guy who claimed to have made a working PC within Minecraft, which simulated one, including the very core stuff like RAM, cache, registers etc.