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Volver a Mathematics for Machine Learning: PCA

Opiniones y comentarios de aprendices correspondientes a Mathematics for Machine Learning: PCA por parte de Imperial College London

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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....

Principales reseñas


6 de jul. de 2021

Now i feel confident about pursuing machine learning courses in the future as I have learned most of the mathematics which will be helpful in building the base for machine learning, data science.


16 de jul. de 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.

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426 - 450 de 719 revisiones para Mathematics for Machine Learning: PCA

por Lotachukwu I

27 de jun. de 2020

Very challenging at times, but very good course none the less. Would recommend to any one who has a solid foundation of Linear Algebra (Course 1) and Multivariate Calculus (Course 2).

por Zhou W

4 de oct. de 2020

Fascinating course! The lecturer gives very detailed illustrations to many complicate concepts. It will be much better if the submitting systems work fine for the last assignment.

por Faisal R 2

28 de may. de 2020

Course content is interesting and well planned, Can be improved by making it Simpler for Students as it was more technical than the other 2 courses of the Specialization.

por Tarik R

10 de sep. de 2020

it's very fantastic course.i enjoyed a lot.i feel reading material should be increases in those courses,others things are perfectly ok.thanks for offering this courses.

por Abhishek P

9 de sep. de 2019

Course content tackles a difficult topic well. Only flaw is that programming assignments are poorly designed in some places and are quite difficult to pick up at times.

por Hadhrami A G

7 de jun. de 2020

The course is generally good but the assignment setting definitely needs to be rectified. Thanks anyway for this course. An important element of machine learning.

por Liang S

9 de jul. de 2018

Teaching pacing is good, and clear in explanation. It will be good if there are some examples about how we should apply all these theories to some real problems.

por Kevin E

27 de ago. de 2020

Overall the course was great. The only thing was that there was a lot I didn't understand from the videos. The recommended textbook resource was a great help.

por Ezequiel P

26 de sep. de 2020

The other two courses were much more didactic. And there were some bugs in these courses assignments... But, overall, it was a great course on the subject

por Mohamed B

27 de oct. de 2019

I learned a lot in this course, though the last week was somehow hurried and the lecturer didn't spend enough time to piece the whole stuff together.

por Jorge L C T

5 de sep. de 2021

The explanation of the model is very precise but there are unnecesary comments for PCA omit the comments related with std in the final assignment

por Rok Z

5 de feb. de 2020

A different course than the previous 2.

Much harder - as you have to actually know some Python tricks.

But I guess it's the same in a real world.

por Jordan V

23 de ago. de 2019

Course addresses important subject, but I worth like to have more in-depth explanation of the mathematics by the instructors and more examples.

por Kevin G

14 de ene. de 2020

Felt like explanations in this course were a bit confusing, but otherwise, it was a very interesting course. Thank you so much for doing this.

por Helena S

28 de feb. de 2020

The final Notebook contains some errors (Xbar instead of X, passed as an argument). Otherwise a very well organized course. Thanks a lot!

por Giri G

7 de jun. de 2019

This was a very hard course for me. But I think the instructor has done the best possible he can with presenting and explaining the course

por Leon T

10 de jul. de 2020

Jupyter notebook assignments are in desperate need of attention! Very buggy or non-intuitive for the scope of material in span of time.

por Christine W

13 de ago. de 2018

Coding assignment is hard for people who are not familiar with numpy. Would appreciate some material at least going over the basis.

por Hưng P

9 de mar. de 2022

The lecture & instructor are great. But the grader in the assignments really needs revisions. It caused lots of unnecessary stress

por Shaiman S

30 de abr. de 2020

Please change courese material for PCA. It is very un-understandable and assignments are also very tugh as per what is taught.

por Karan S

1 de ago. de 2020

Focus a bit more on PCA in week 4, week 1 was not very informative and should be assumed as required knowledge for the course

por Hilmi E

20 de abr. de 2020

Careful, step-by-step construction of the PCA algorithm with practical exercises and coding assignments.. Very well done...

por Voravich C

21 de oct. de 2019

The course level is very difficult and I think having four week course is not enough to understand the math behind PCA

por Phuong N

17 de oct. de 2018

That's a great online courses can help people have enough background to break into Machine Learning or Data science

por Ananthesh J S

16 de jun. de 2018

The PCA derivation part requires more elaborate explanation so that we can understand the concept more intuitively.