返回到 Mathematics for Machine Learning: PCA

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1,268 個評分

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271 條評論

This intermediate-level course introduces the mathematical foundations to derive Principal Component Analysis (PCA), a fundamental dimensionality reduction technique. We'll cover some basic statistics of data sets, such as mean values and variances, we'll compute distances and angles between vectors using inner products and derive orthogonal projections of data onto lower-dimensional subspaces. Using all these tools, we'll then derive PCA as a method that minimizes the average squared reconstruction error between data points and their reconstruction.
At the end of this course, you'll be familiar with important mathematical concepts and you can implement PCA all by yourself. If you’re struggling, you'll find a set of jupyter notebooks that will allow you to explore properties of the techniques and walk you through what you need to do to get on track. If you are already an expert, this course may refresh some of your knowledge.
The lectures, examples and exercises require:
1. Some ability of abstract thinking
2. Good background in linear algebra (e.g., matrix and vector algebra, linear independence, basis)
3. Basic background in multivariate calculus (e.g., partial derivatives, basic optimization)
4. Basic knowledge in python programming and numpy
Disclaimer: This course is substantially more abstract and requires more programming than the other two courses of the specialization. However, this type of abstract thinking, algebraic manipulation and programming is necessary if you want to understand and develop machine learning algorithms....

Jul 17, 2018

This is one hell of an inspiring course that demystified the difficult concepts and math behind PCA. Excellent instructors in imparting the these knowledge with easy-to-understand illustrations.

May 01, 2018

This course was definitely a bit more complex, not so much in assignments but in the core concepts handled, than the others in the specialisation. Overall, it was fun to do this course!

篩選依據：

創建者 Hritik K S

•Jun 20, 2019

Maths is just like knowing myself very well!

創建者 Naggita K

•Dec 19, 2018

Great course. Rich well explained material.

創建者 Xi C

•Dec 31, 2018

Great course. Cover rigorous materials.

創建者 Akshaya P K

•Jan 25, 2019

This was a tough course. But worth it.

創建者 Eli C

•Jul 22, 2018

very challenging and rewarding course

創建者 任杰文

•May 13, 2019

It's great, interesting and helpful.

創建者 Carlos S

•Jun 11, 2018

What you need to understand PCA!!!

創建者 Gautham T

•Jun 16, 2019

excellent course by imperial

創建者 imran s

•Dec 20, 2018

Great Coverage of the Topic

創建者 Ajay S

•Apr 09, 2019

Great course for every one

創建者 Ricardo C V

•Dec 25, 2019

Challenging but Excellent

創建者 Keisuke F

•Sep 15, 2019

I had big fun of PCA

創建者 Sujeet B

•Jul 21, 2019

Tough, but great!

創建者 Jitender S V

•Jul 25, 2018

AWESOME!!!!!!!!!!

創建者 Shanxue J

•May 23, 2018

Truly exceptional

創建者 Lintao D

•Sep 24, 2019

Very Good Course

創建者 Shounak D

•Sep 15, 2018

Great course !

創建者 Andrey

•Sep 17, 2018

Great course!

創建者 Samresh

•Aug 10, 2019

Nice Course.

創建者 David N

•Jul 24, 2019

Great course

創建者 Mohamed H

•Aug 10, 2019

fantastic

創建者 Karthik

•May 03, 2018

RRhis cl

創建者 Akash G

•Mar 20, 2019

awesome

創建者 Bálint - H F

•Mar 20, 2019

Great !

創建者 HARSH K D

•Jun 28, 2018

good