# Deep Learning Prerequisites: Linear Regression in Python

Data science: Learn linear regression from scratch and build your own working program in Python for data analysis.
4.6 (541 ratings) 6,109 students enrolled Bestselling in Python
Instructed by Lazy Programmer Inc.
\$120
• Lectures 29
• Length 3 hours
• Skill Level All Levels
• Languages English
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Published 9/2015 English

### Course Description

This course teaches you about one popular technique used in machine learning, data science and statistics: linear regression. We cover the theory from the ground up: derivation of the solution, and applications to real-world problems. We show you how one might code their own linear regression module in Python.

Linear regression is the simplest machine learning model you can learn, yet there is so much depth that you'll be returning to it for years to come. That's why it's a great introductory course if you're interested in taking your first steps in the fields of:

• deep learning
• machine learning
• data science
• statistics

In the first section, I will show you how to use 1-D linear regression to prove that Moore's Law is true.

What's that you say? Moore's Law is not linear?

You are correct! I will show you how linear regression can still be applied.

In the next section, we will extend 1-D linear regression to any-dimensional linear regression - in other words, how to create a machine learning model that can learn from multiple inputs.

We will apply multi-dimensional linear regression to predicting a patient's systolic blood pressure given their age and weight.

Finally, we will discuss some practical machine learning issues that you want to be mindful of when you perform data analysis, such as generalization, overfitting, train-test splits, and so on.

This course does not require any external materials. Everything needed (Python, and some Python libraries) can be obtained for FREE.

If you are a programmer and you want to enhance your coding abilities by learning about data science, then this course is for you. If you have a technical or mathematical background, and you want to know how to apply your skills as a software engineer or "hacker", this course may be useful.

This course focuses on "how to build and understand", not just "how to use". Anyone can learn to use an API in 15 minutes after reading some documentation. It's not about "remembering facts", it's about "seeing for yourself" via experimentation. It will teach you how to visualize what's happening in the model internally. If you want more than just a superficial look at machine learning models, this course is for you.

NOTES:

All the code for this course can be downloaded from my github: /lazyprogrammer/machine_learning_examples

In the directory: linear_regression_class

Make sure you always "git pull" so you have the latest version!

HARD PREREQUISITES / KNOWLEDGE YOU ARE ASSUMED TO HAVE:

• calculus
• linear algebra
• probability
• Python coding: if/else, loops, lists, dicts, sets

TIPS (for getting through the course):

• Watch it at 2x.
• Ask lots of questions on the discussion board. The more the better!
• Realize that most exercises will take you days or weeks to complete.

USEFUL COURSE ORDERING:

• (The Numpy Stack in Python)
• Linear Regression in Python
• Logistic Regression in Python
• (Supervised Machine Learning in Python)
• (Bayesian Machine Learning in Python: A/B Testing)
• Deep Learning in Python
• Practical Deep Learning in Theano and TensorFlow
• (Supervised Machine Learning in Python 2: Ensemble Methods)
• Convolutional Neural Networks in Python
• (Easy NLP)
• (Cluster Analysis and Unsupervised Machine Learning)
• Unsupervised Deep Learning
• (Hidden Markov Models)
• Recurrent Neural Networks in Python
• Natural Language Processing with Deep Learning in Python

### What are the requirements?

• How to take a derivative using calculus
• Basic Python programming

### What am I going to get from this course?

• Derive and solve a linear regression model, and apply it appropriately to data science problems
• Program your own version of a linear regression model in Python

### Who is the target audience?

• People who are interested in data science, machine learning, statistics and artificial intelligence
• People new to data science who would like an easy introduction to the topic
• People who wish to advance their career by getting into one of technology's trending fields, data science
• Self-taught programmers who want to improve their computer science theoretical skills
• Analytics experts who want to learn the theoretical basis behind one of statistics' most-used algorithms

### What you get with this course?

Not for you? No problem.
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# Curriculum

Section 1: Introduction and Outline
Introduction and Outline
03:35
05:13

We will discuss a broad outline of what machine learning is, and how linear regression fits into the ecosystem of machine learning. We will discuss some examples of linear regression to give you a feel for what it can be used for.

Introduction to Moore's Law Problem
02:30
What can linear regression be used for?
1 question
Section 2: 1-D Linear Regression: Theory and Code
Define the model in 1-D, derive the solution
14:52
Coding the 1-D solution in Python
07:38
Determine how good the model is - r-squared
05:50
R-squared in code
02:15
Demonstrating Moore's Law in Code
08:00
R-squared
1 question
Section 3: Multiple linear regression and polynomial regression
Define the multi-dimensional problem and derive the solution
17:07
How to solve multiple linear regression using only matrices
01:55
Coding the multi-dimensional solution in Python
07:29
Polynomial regression - extending linear regression (with Python code)
07:56
Predicting Systolic Blood Pressure from Age and Weight
05:45
R-squared
1 question
Section 4: Practical machine learning issues
Generalization error, train and test sets
02:49
Generalization and Overfitting Demonstration in Code
07:32
Categorical inputs
05:21
One-hot encoding
1 question
L2 Regularization - Theory
04:21
L2 Regularization - Code
04:13
The Dummy Variable Trap
03:58
04:30
02:13
Bypass the Dummy Variable Trap with Gradient Descent
04:17
L1 Regularization - Theory
03:05
L1 Regularization - Code
04:25
L1 vs L2 Regularization
03:05
Section 5: Conclusion and Next Steps
Brief overview of advanced linear regression and machine learning topics
05:14
Exercises, practice, and how to get good at this
03:54
Section 6: Appendix
BONUS: Where to get Udemy coupons and FREE deep learning material
02:20
How to install Numpy, Scipy, Matplotlib, Pandas, IPython, Theano, and TensorFlow
17:22

# Instructor Biography

Lazy Programmer Inc., Data scientist and big data engineer

I am a data scientist, big data engineer, and full stack software engineer.

For my masters thesis I worked on brain-computer interfaces using machine learning. These assist non-verbal and non-mobile persons communicate with their family and caregivers.

I have worked in online advertising and digital media as both a data scientist and big data engineer, and built various high-throughput web services around said data. I've created new big data pipelines using Hadoop/Pig/MapReduce. I've created machine learning models to predict click-through rate, news feed recommender systems using linear regression, Bayesian Bandits, and collaborative filtering and validated the results using A/B testing.

I have taught undergraduate and graduate students in data science, statistics, machine learning, algorithms, calculus, computer graphics, and physics for students attending universities such as Columbia University, NYU, Humber College, and The New School.

Multiple businesses have benefitted from my web programming expertise. I do all the backend (server), frontend (HTML/JS/CSS), and operations/deployment work. Some of the technologies I've used are: Python, Ruby/Rails, PHP, Bootstrap, jQuery (Javascript), Backbone, and Angular. For storage/databases I've used MySQL, Postgres, Redis, MongoDB, and more.