Finish Machine Learning introductory course
I started Standford's machine learning course but after getting stuck in one assignment (ex4, Week5), it fell of the table due to lack of time and focus.
I will use this Hack Week to make some progress on it.
Day 1
- Studied back-propagation algorithm again, starting Week 5 from scratch
Day 2
- Focused in the homework itself, understanding what I did last time.
- Cross checked vector dimensions, to understand better
- Simplified the code by vectorizing the second part the whole thing
- Solved a mystery with dimensions realizing that in order to calculate δ2, I need to ignore the first column of Θ2 (bias)
Some progress
Part Name | Score | Feedback --------- | ----- | -------- Feedforward and Cost Function | 30 / 30 | Nice work! Regularized Cost Function | 15 / 15 | Nice work! Sigmoid Gradient | 5 / 5 | Nice work! Neural Network Gradient (Backpropagation) | 40 / 40 | Nice work! Regularized Gradient | 0 / 10 | -------------------------------- | 90 / 100 |Working now on the regularized gradient. Homework additional material was helpful to understand the restriction of j=0
Part Name | Score | Feedback --------- | ----- | -------- Feedforward and Cost Function | 30 / 30 | Nice work! Regularized Cost Function | 15 / 15 | Nice work! Sigmoid Gradient | 5 / 5 | Nice work! Neural Network Gradient (Backpropagation) | 40 / 40 | Nice work! Regularized Gradient | 10 / 10 | Nice work! -------------------------------- | 100 / 100 |Continued with Week 6
- Model Selection
- Ways to diagnose bias vs variance by separating data into cross-validation and test sets
Day 3
- Used on another Hackweek project
Day 4
- Continued with model selection and bias/variance vs other parameters
Day 5
- Finished Week 6 material. Debugging models and strategies to attack high bias or high variance
- Quiz for Week 6. 100%
- Started homework (ex5)
- Implemented Regularized Linear Regression Cost Function and Regularized Linear Regression Gradient
Looking for hackers with the skills:
This project is part of:
Hack Week 19
Comments
Be the first to comment!
Similar Projects
Advent of Code: The Diaries by amanzini
Description
It was the Night Before Compile Time ...
Hackweek 25 (December 1-5) perfectly coincides with the first five days of Advent of Code 2025. This project will leverage this overlap to participate in the event in real-time.
To add a layer of challenge and exploration (in the true spirit of Hackweek), the puzzles will be solved using a non-mainstream, modern language like D, Crystal, Gleam or Zig.
The primary project intent is not just simply to solve the puzzles, but to exercise result sharing and documentation. I'd create a public-facing repository documenting the process. This involves treating each day's puzzle as a mini-project: solving it, then documenting the solution with detailed write-ups, analysis of the language's performance and ergonomics, and visualizations.
|
\ ' /
-- (*) --
>*<
>0<@<
>>>@<<*
>@>*<0<<<
>*>>@<<<@<<
>@>>0<<<*<<@<
>*>>0<<@<<<@<<<
>@>>*<<@<>*<<0<*<
\*/ >0>>*<<@<>0><<*<@<<
___\\U//___ >*>>@><0<<*>>@><*<0<<
|\\ | | \\| >@>>0<*<0>>@<<0<<<*<@<<
| \\| | _(UU)_ >((*))_>0><*<0><@<<<0<*<
|\ \| || / //||.*.*.*.|>>@<<*<<@>><0<<<
|\\_|_|&&_// ||*.*.*.*|_\\db//_
""""|'.'.'.|~~|.*.*.*| ____|_
|'.'.'.| ^^^^^^|____|>>>>>>|
~~~~~~~~ '""""`------'
------------------------------------------------
This ASCII pic can be found at
https://asciiart.website/art/1831
Goals
Code, Docs, and Memes: An AoC Story
Have fun!
Involve more people, play together
Solve Days 1-5: Successfully solve both parts of the Advent of Code 2025 puzzles for Days 1-5 using the chosen non-mainstream language.
Daily Documentation & Language Review: Publish a detailed write-up for each day. This documentation will include the solution analysis, the chosen algorithm, and specific commentary on the language's ergonomics, performance, and standard library for the given task.