February 15, 2020

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Python programming assignments for Machine Learning by Prof. Andrew Ng in Coursera

repo name nsoojin/coursera-ml-py
repo link https://github.com/nsoojin/coursera-ml-py
language Python
size (curr.) 22983 kB
stars (curr.) 837
created 2017-03-21
license MIT License

Coursera Machine Learning Assignments in Python

author python license contribution



If you’ve finished the amazing introductory Machine Learning on Coursera by Prof. Andrew Ng, you probably got familiar with Octave/Matlab programming. With this repo, you can re-implement them in Python, step-by-step, visually checking your work along the way, just as the course assignments.

How to start


This project was coded in Python 3.6

  • numpy
  • matplotlib
  • scipy
  • scikit-learn
  • scikit-image
  • nltk


The fastest and easiest way to install all these dependencies at once is to use Anaconda.

Important Note

There are a couple of things to keep in mind before starting.

  • all column vectors from octave/matlab are flattened into a simple 1-dimensional ndarray. (e.g., y’s and thetas are no longer m x 1 matrix, just a 1-d ndarray with m elements.) So in Octave/Matlab,
    >> size(theta)
    >> (2, 1)
    Now, it is
    >>> theta.shape
    >>> (2, )
  • numpy.matrix is never used, just plain ol' numpy.ndarray


Exercise 1

  • Linear Regression
  • Linear Regression with multiple variables

Exercise 2

  • Logistic Regression
  • Logistic Regression with Regularization

Exercise 3

  • Multiclass Classification
  • Neural Networks Prediction fuction

Exercise 4

  • Neural Networks Learning

Exercise 5

  • Regularized Linear Regression
  • Bias vs. Variance

Exercise 6

  • Support Vector Machines
  • Spam email Classifier

Exercise 7

  • K-means Clustering
  • Principal Component Analysis

Exercise 8

  • Anomaly Detection
  • Recommender Systems


You can check out my implementation of the assignments here. I tried to vectorize all the solutions.

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