Great course. A progressive discovery of the maths inner to the learning algorithms. This course gives that insight many ML practitioners don't have and is so important for making real use cases work.
This course is one of the most valuable courses I have ever done. Thank you very much to the teacher and to all those who have made it possible! I will recommend it to all those who may be interested.
автор: Robert F D•
First off, I think the course content is amazing! I really like that the instructor used Matlab that encourages the user to create vectorized solutions to the problems. I have heard many negative comments regarding the lack of use of Python, R, or some other library like Cafe or TensorFlow, but I believe all of that should follow after having the mathematical background to understand these principles. The content is not easy, and requires a fair bit of mathematical sophistication, but not so much to lose me, and hard enough to keep me engaged. I really enjoy how each learning unit builds off of the previous one, for instance, linear regression become logistic regression which becomes a neural network.
That being said, I really think that this course needs to have a fresh coat of paint on it. I believe it was filmed in 2008. I don't think the content really has been revamped since its release. The recordings look like they were filmed on an old web cam, not even as good as a modern iPhone. The slides should have some design work on them. I know it seems petty to stress over the presentation, but I think many people are turning to programs from Udacity that are very flashy, but not as technically rigorous mainly, I feel, just because of the presentation. I think that this course deserves a bit of energy polishing it up since it's still perhaps the most popular MOOC course out there.
автор: Richard H•
Absolutely top notch class - I would say this is the best class, online or off, that I have ever taken:
Instruction is very well structured - building on prior components to build up to more complex advanced ones. This is especially important due to the mathematical and programming concepts required of the domain.
Quizzes are well timed to help evaluate learning - and really the primary purpose is to try to make students think about the subject material and reinforce the concepts. Programming exercises do require some basic knowledge of programming, but the use of Octave (or Matlab) as a tool and the prepared programs in which the student completes carefully chosen/defined missing components definitely reduces the programming burden and helps keep focus on the actual concepts.
The resources for lectures, quizzes, and programming assignments are invaluable, as well as the community built up around those questions. Using them during the course is essential.
Not least of all - the mentors - they are a great help in answering those odd, peripheral questions that really, fully, complete your personal understanding of the material (My personal thanks Tom and Neil for answering my quirky questions)
Kudos to Andrew and the Mentors for an exceptional class - I think it could really make an impact in education and helping realize the huge positive potential of this technology.
автор: Paradoks S•
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автор: Jacob M•
Full disclosure: I am a mathematician, and therefore already well-trained in linear algebra, and I'm only 6 weeks into this course.
This course has been a near-perfect introduction to neural networks. Great pedagogical decisions were made to gradually bring the student from basic linear regression to motivating why a neural network is a logical next step to improve this process. This course has made me fluent in important terminology to deep learning and data analysis like bias, variance, precision, recall, and so much more. Not to mention, I've learned MatLab/Octave from scratch, which has turned out to be a nice programming language to add to my collection.
A caveat for non-mathematicians, or for that matter anyone not fluent in linear algebra: the neural networks will be a struggle. Some of the formulas relating to these may also be frustrating because I expect you won't understand why they work, or how to debug your code. I strongly recommend that you consider a rigorous linear algebra course, as a co- or pre-requisite.
To mathematicians: this course is a great starting-off point for learning about neural networks and other machine learning concepts. I already see applications to and from my research. In addition, I am able to explore the literature and decide on avenues for further exploration. Andrew Ng has truly provided a gift here to us.
автор: Melissa K•
I had always heard great things about this class during my research on what online courses to take next in my path towards becoming a data scientist. I was hesitant because it used Octave, a program I didn't think was going to be useful in my future roles. Then I completely bombed a phone interview in which they asked me the specific steps behind linear regression, and about gradient descent and the cost function. And I realized I didn't really know much about how these algorithms worked, although I used them in my day-to-day projects as a data analyst. So I finally decided to take this class, and after 11 weeks I can say that I experience WAY LESS imposter syndrome than before. I've still got a lot more to learn, but I'm confident that with everything Andrew Ng taught in this course, I will be able to hit the ground running on many other courses, with a thorough understanding of tools to use and the best ways to use them. In the end, Octave was just a little tiny component of a very scope of knowledge you'll attain after finishing this course. So if you're hesitant to take this course because of that, please don't be! I'm really grateful a course like this exists in a way that is easy to understand and is buildable. I'd consider this one of the best uses of my time outside of work, and I'd do it all over again now knowing what I have to gain from it.
This was my first on line course and the experience has been amazing. The lectures by Prof Andrew Ng were clear and the follow up programming exercises helped reinforce and enhance the concepts covered in the lectures.
The entire course was very well organized - videos, notes, discussion groups, suggestions and tips by the mentors was very easy to follow.
The focus of this course is on the practical application of machine learning techniques (supervised learning mostly but also some non supervised learning). Prof Andrew tries not to get into the advanced mathematical concepts but instead provides good intuition and then shows one how to apply the different ideas underpinning machine learning with some practical examples. In my view, this is an excellent way to quickly become familiar the concepts and to see machine learning in action. A student of the course will gain very good insights and can then follow up with the underlying math as needed.
The final two lectures on how to scale machine learning to large systems and a suggested systematic framework for figuring out which aspects of the design to focus on were very instructive.
In summary, i would highly recommend this course to anyone interested in the area of machine learning. Be prepared to work through some challenging (but very worthwhile) programming exercises to get the most out of the course.
It is a very nice introductory course in machine learning. It teaches a good range of machine learning algorithms and good advices on how to implement them effectively. At the end of the course I feel like I am ready to tackle some machine learning projects on my own and I am sure many others who finished will too.
For someone with a strong mathematical background like me (Have a undergraduate degree in maths and theoretical physics), the maths component is lacking. There are little derivations on equations and feels like I could've understood some of the algorithms deeper and instructor cannot teach it here. It feels especially true in supper vector machine. Also if you are strong in linear algebra and really familiar with matrix multiplication rules you can vectorize some implementation very effective and reduce what could be five lines of codes to one.
For someone without a strong mathematical background, I think the main difficulty is going through the messy indexing in equations and actually implementing algorithms with a lots of for-loops. It is also hard to fully understand some concepts behind some algorithms like support vector machine and relate the resulting algorithm with the concept.
I enjoyed the course a lot and really have learnt a lot. Now I feel ready to start some machine learning projects on my own and dive deeper into this field.
автор: Chin-Chieh, W•
I love this course. It's my highly recommendation to everyone who wants to learn machine learning. Machine learning is definitely the state-of-the-art topic, but it would be difficult to learn because it combines the linear algebra, calculus, programming skills, algorithms, etc. There are tons of threads for learners to get distracted from the main theme they need to focus on. That's why I am amazed by Andrew's machine learning course. It's so amazing that Andrew just makes a very complicated topic very easily understandable and very easily to learn. What's more, whether learners have learned calculus or programming or not, they can still easily understand the mechanism of various machine learning algorithms even though some proofs of the formula are not discussed. Moreover, this course does cover many most well-known machine learning algorithms. I enjoy this course a lot and I am so eager to learn more in the last few lessons. Thank you very much, Andrew. You definitely give me one of the best courses in my life.
автор: Alejandro O•
Andrew Ng’s ML course is a great introduction to ML. The course covers fundamental learning algorithms in the right amount of depth for the student to gain an intuition for mathematics and applications of the algorithms. While the course can be completed without much knowledge in either Linear Algebra and Calculus, to truly understand the learning algorithms a solid foundation in both is necessary.
The video lectures are succinct and focus on a singular topic which makes it easy to make progress and pinpoint the exact material that needs review. Andrew is honest about what you need to know and provides extensive explanations from problem motivation, intuition, mathematics, and applications.
The assignments are challenging but not overwhelming (except for the Neural Network assignment). The test cases, tutorials, discussion threads, and handouts provided enough support to make assignments enjoyable.
The quizzes are short and the ability to retake the quizzes make them stress free. The questions are derived from the course materials so a quick review of the videos and lectures were sufficient preparation.
By the end of the course, the student will feel comfortable diving deeper into learning algorithms of interest and applying them to projects. I highly recommend this course for those who are new to ML and want to get up to speed quick!
автор: Ryan C•
Exceptional course. Demanding in terms of time required to complete properly, but worth every second. Future students beware: going through this course is a double-edged sword. You'll suddenly want to solve any problem you have at work/school with some application of ML. If this course is your first comprehensive introduction to ML then expect to utter the phrase "...well now this changes everything" on multiple occasions. Next thing you know you'll be buying books on Amazon trying to learn Python in your spare time so you can REALLY do some ML damage with all the importable libraries.
Structure of the course is perfect. He segments the lectures into a reasonable length, allowing you to bite off a little at a time. There is even the option to roll over into the next class if life throws you a curve-ball. You get the sense that he wants you to succeed and finish the class, and him giving students the chance to extend their enrollment indefinitely supports that assumption.
Take the class. Expense it. Count it towards your annual training budget. Your boss [should] be VERY enthusiastic about you asking for training that costs under $100. It's an easy choice: you can pick 12 weeks of in-depth lectures, notes and hands-on learning OR continue trying to sell your boss on that 2-day, $2500 conference in [whatever city it is this year].
автор: Matt D V•
Machine Learning from Stanford by Andrew NG is the cornerstone of online courses for Machine Learning - for multiple reasons.
As a non-technical founder looking to further my knowledge and comprehension of the complex AI landscape, AI for Everyone from Andrew felt not enough. Andrew's Machine Learning course finally gets our feet wet with algorithms and the fundamental, underlying mathematics to Machine Learning.
Though intimidating at first, Andrew's Machine Learning class is properly paced, and has the necessary tools and resources to get you through the class without feeling lost. The pacing is adequately supported by quizz that force the learner to conceptualize his learnings to deduct proper reasoning.
Don't kid yourself, this course remains a beginner entry into the AI field and one should expect to take a further dive into more advanced courses of Mathematics, Data Science, Python, Machine Learning & Deep Learning with the ultimate goal to have the ability to create your own ML/DL systems.
The programming assignments in Octave were a bit bleh - as they will unfortunately not translate to production / prototyping environments which are for the most part in Python.
Andrew is a great teacher and makes the complex field of AI feel attainable for driven, smart people from any background.
Best of luck in your journey!
автор: Cornelis D H•
An approachable introduction I recommend to anyone and everyone that at the least has matrix algebra under their belt. I took this with the intention of reviewing material, yet many concepts I had previously been exposed to were approached in such a clear manner that it felt brand new to me. I'm shocked at how much more clarity this course offered than my university! Moreover, it is absurd that I did a lot more work in my machine learning university course, yet never saw it pay off in an interview. This course was far less work (i.e. less time-consuming), but the pay-off knowledge-wise for interview questions has been demonstrably far far more time-effective. I highly recommend this course if you are limited on time and want a course to give you an edge in interviews. The big downside of this course is that there is no term project. In my case that was fine since I already have ML projects under my belt and needed to review all ML concepts at a general level, but if you don't have any noteworthy ML projects and are looking to dive into one, I'd still highly recommend this course (so many problems I can point out now with my ML projects in interviews for instance!!) but know that you'll want to move onto another project-focused course or a personal ML project after this for sure to get yourself ML-interview ready ;)
автор: David C•
This is by far the best Coursera (or any MOOC) class I've taken. The production values are low, but the content is excellent. Professor Ng explains everything very clearly. The best part is the homework. Each assignment is explained in detail and the assignments lead you in small steps to make measurable progress as each step is accomplished. The 5-6 page PDF that accompanies each programming assignment provides all the information needed to fully understand what you are being asked to accomplish. I have had MANY other MOOC's where the information in programming assignments amounts to a few sentences embedded in a Jupyter notebook and students are forced to search through numerous forum questions and answers to get an explanation of what you are really being asked to do. Not in this course! Everything is explained very well. I might also mention that while most other machine learning courses are taught at a very high level, using Python and Scikit learn or other ML packages that do the heavy lifting, this course has you actually implement ML programs at a very low level, using linear algebra and vector math so that you really get to see how these higher-level packages implement the detailed algorithms. No black boxes here. I HIGHLY recommend this course to anyone interested in machine learning.
автор: Ritwik D•
First of all I'm so thankful to Andrew NG for this wonderful course and I'll always be in debt to him for this masterpiece. At the very start, when I was just starting out, I was really unsure whether this would be the right course for me as this is an 11 week course. I was also concerned about the usage of MATLAB/ Octave over Python. But choosing this course, I realized it didn't really matter given that you know how an algorithm is working under the hood. I love how Mr. NG has the special ability to teach such complicated topics with so much ease. I can never expect the same from any faculty I've personally come across. Yes, the programming exercises were sort of a pain but there are github repos that let you do the same in Python. What I've learned over these 11 weeks, I believe, is immensely valuable and probably very few courses out there are capable of that. This perhaps has been one of the best decisions of mine so far. I plan on moving on to deep learning after this, thanks to Mr. Andrew NG.
Also, over this course of 11 weeks I felt attached to Mr. Andrew NG and I can proudly say that he's been the best teacher I've ever come across. It was a little hard to watch the last and final video knowing its the end of the road. So thank you sir for this wonderful work of art! I'll forever be in debt.
автор: Vincent B•
This is my first online course and I am so happy I selected Andrew's Machine Learning course as my first. The material was well presented, provided plenty of information about why and how you should use each Machine Learning method and importantly he spends time time providing the intuition for why certain mathematical formulas are used. The quizzes were challenging and gave you ongoing feedback on wether you were grasping the material in each section. When you get one of the questions wrong it helpfully points you back to the appropriate material in the lectures to review. Finally, I would like to thank Tom Mosher, a mentor and the author of most all the programming assignment tutorials and a constant presence and help on the discussion boards. I didn't have to ask many questions but that was primarily because someone else already had and Tom provided the answer, often times within minutes or hours. Even though I have little experience with online courses, the amount of support and attention to detail throughout demonstrates how good this course is and I can only hope is held up as a model for other courses. Thank you Andrew and Tom. I am truly grateful and can confidently say it was 10 weeks of work well worth my time and the knowledge that I gained will be used at my employer immediately.
автор: Cameron P•
This is an excellent course covering the fundamentals of machine learning with a wide breadth of subjects as well as, in my opinion, a reasonable depth into each as well. My only major qualm with the course (and this is just personal preference of what I would like to have learned) is that the programming language used for this course (that you must do the assignments in) is Octave/Matlab. As Dr. Ng mentions in the class, Octave/Matlab is an excellent way to prototype your machine learning algorithms, and after having used it for this course I agree. However, I believe it would have been much more useful (personally) to do the programming parts in a more industry standard language for your final product such as python. Point being, having completed the course I feel that before I can apply this as a final solution I must still learn how to implement these algorithms in a different language with different libraries, so it doesn't feel quite as if my journey is 100% finished. That being said, I do feel that Dr. Ng gave a great mathematical understanding of the algorithms and I do not believe that it will be terribly hard to implement them in another language. I believe the only barrier would be learning the Matrix Algebra and other ML related libraries standardly used in that language.
автор: Thomas T•
Hi. This is a great course which would be made even better with the small change I describe below. I was referred here by Nicole who was handling this as Support Case #1188060. I understand the mentors have been seeking this improvement for some time. Please let me know if I can clarify or assist in any way. Thanks in advance.
---- Support Case #1188060 ----
Hi. I'm writing regarding the Machine Learning course taught by Andrew Ng of Stanford. I have learned there is a compilation of "errata," known errors in the videos and course materials for each week, which has been made available in per-week links like the following:
I found these links only after digging through discussions. In my own discussions afterwards, I learned that I wasn't the only one having trouble finding the errata. Apparently it's a long-standing problem which creates extra work for mentors as well as slowing down students. Would it be possible to provide the errata links, or a link to the Machine Learning Course wiki, in a dedicated section of the Course Content? This would help a lot of people. Please see the discussion below for more perspective.
Thanks for your consideration.
автор: Demitri M•
Gently-paced and reasonable in terms of course work load, even for a busy person. This course greatly demystified machine learning for me.
Alvin's lectures are friendly and easy to follow, and progress smoothly from one point of interest to the next, always taking time to briefly recap on precursor topics that were previously discussed.
I really appreciate how the assignments focus on the core algorithms and their implementation. Ancillary implementation steps and a scaffolding for testing and viewing the results are already given for the learner to use, play with, and go back and reference for educational purposes if need be, for refreshing on use of tools such as plotting methods. The way the assignments are structured, putting emphasis on filling in the gaps with implementation of the important algorithms, makes completing assignments a very satisfying and fulfilling experience. I feared I would get caught up in preliminary steps, i.e. getting plots to display correctly or cleaning up the data, but that's all taken care of so that one can focus on practicing the techniques most relevant to the topic and algorithms.
I only wish there were more assignments to complete, both to cover more of the course's material and to have more chances to practice algorithm prototyping in Octave/Matlab.
This course in Machine Learing was challenging, but do-able... and very rewarding. This is the first on-line course I've taken. It has been many years since my last formal college course, so I was a little rusty at the math (I'm 55 yrs old, ancient compared to my peers in this class. My last math class was over 3 decades ago, probably before most of my classmates were born. Damn, I'm old). Even so, with Mr. Ng's teaching style, I was able to finish the course with both a good grade and - better still - a good grasp on the subject material. I will certainly continue to pursue additional learning in this area.
Machine Learning is a fascinating field. I was interested in this area way back in the late 80's when I first heard the term "Neural Network", but there were no on-line courses in that pre-internet era, so the availability of information about the subject was very limited. It was mainly in breathless magazine articles about the coming "AI" revolution. It took a few decades for that promising spark to mature into a practical reality. Now, with the appearance of Coursera and other on-line education portals, much of this information is readily available to all with the curiosity and perseverance to learn about it.
I am grateful for this opportunity to learn about Machine Learning!
автор: Rahul K•
An exceptional journey through this vastly mind-boggling domain that is Machine learning. What a ride it has been! I must admit, before I started this course, I was pretty skeptical about it. Back then, Machine Learning seemed like magic to me. Only after this course did I realize that Machine Learning isn't as intimidating as it seems. In fact, if you have basic arithmetic skills, you can learn Machine learning to a very reasonable extent. Prof. Andrew Ng, hats off to you! You have cemented yourself as a role model for me since these past few weeks.
Just as an aside, I wanted to let all the readers know that I am working a 9-5 job in IT. Not to be a humblebrag, but seeing that I took time out to complete this course just goes to show that if you put significant effort and planning, you will be able to complete this course (rather, any course) in the stipulated time frame.
The curriculum that this course offers is challenging - You don't get spoon-fed answers when you want them. Just a little hint - Pay very close attention to everything Prof. Andrew says in the lecture. Don't open other tabs and listen to the lectures in the background.
Overall, a fantastic course! Very excited about what ML holds in the future. Prof. Andrew, we need more series from you! Thank you so, so much!
автор: sandeep m•
An excellent course.
Helps one Understand the core foundations of machine learning and the learning machinery.
How do algorithms learn from data and produce models (Generated code representing a complex math function, tree, forest or a Neural network)
The above skill is very important as compared to just the application side of ML. The application side generally involves mapping use-cases to certain ML-API's.
This translates further to Rote learning (cramming) all the various ML Api's offered by various frameworks, vendor products, and cloud frameworks (Scikit learn, TensorFlow, Spark ml, PyTorch, sagemaker ..........)
End result being, the problem is solved, but without developing a thorough understanding or deep intuition about how it was solved?
It was an arduous effort, as one had to pull oneself after the day job every alternate day or over the weekends. There were numerous hair-splitting frustrating moments that tested one's tenacity.
But the end result was very satisfying and gave a sense of accomplishment. It was fun working on the exercises, designing an algorithmic approach and coding it in Octave.
A very good course that builds the foundation, pushes one's analytical thinking to limits, activates and tunes the grey cells. (The real neurons, pun intended)
автор: Benedict W•
Amazing course. I'm on the founding team of a payments startup, where my role consists mostly of sales, digital marketing, and 'growth hacking'. At university I studied law so I had completely no knowledge of linear algebra or post-high school level mathematics, or programming. Yet I found the material digestible and engaging. At times the material was very challenging but I was usually able to understand after rewatching the videos several times and/or Googling alternative explanations. The programming exercises were not easy for someone with no programming background, but again, Andrew Ng did an excellent job of teaching the basics thoroughly and efficiently. The forums have some useful tips on completing the programming assignments in case you get stuck, which I did make use of occasionally. I did find that towards the end of the course, as I started becoming much comfortable with Matlab syntax and programming logic, I was able to complete most of the assignments without having to look for help in the forums.
All in all, this was a phenomenal course for anyone interested in machine learning. It takes a lot of patience and time to work through all the material and programming exercises (probably 100-150 hours for someone with no stats / CS background) but well worth it!
автор: Danilo D•
An absolutely amazing course!
The lectures are well structured, they go over all the necessary theory for understanding the machine learning algorithms presented and also contain a lot of great examples and illustrations that genuinely help learners better understand the usage of the ML algorithms.
Plethora of materials are at disposal to students: programming test sets, additional literature in the form of suggested textbooks and lectures, and probably one of the most helpful resource - the forums, where Mentors are quick to answer any questions that students may have - something I found very very helpful in enhancing my learning process.
The programming assignments are very good - they are challenging, but also serve as a great learning tool that shows students how all these algorithms we learned about in lectures are actually implemented in practice. They really help students deepen the knowledge, provided they take the time to figure out the solutions themselves. The quizzes are fair and ask from each student to truly understand the matter before answering the questions.
All in all, I would say that the course is very well worth the time invested, and I would gladly suggest anyone who wants to learn about Machine Learning to go ahead and go through this course!
This course is suited for you If you don't have a background in Linear Algebra and Machine Learning.
However, if you do have a background in Calculus and some Linear Algebra you will understand the intuition better (i.e. You can go to the lecture notes for the proofs and math explanation.).
I rarely pay money for a course , but this one worth my money! Specifically, the programming exercise were so helpful to fill in the gaps and give you a real understanding of the concepts been explained. At first you will struggle with the exercises (specially if you don't have a background in MATLAB), then you will get to used to it (i.e. you will ended up solving an exerciser in one day if you are used to it). Added to that, these exercises can be used to create your own Machine Learning Systems. In fact, I was sad that the last two weeks has no assignments. Also, you can learn from the written code in the assignment to visualize your own data. Finally, those exercises are what make the course balanced between the theory and practice! My advice for you: "If you have the money, go for the paid course. You will benefit from it even after you finish!"
I would like to thank Andrew Ng for his effort explaining the concepts and giving me the courage to continue further
автор: Carsten P•
About me: I studied computer science in Dortmund, Germany in the 90ies. I recommend this course to everyone who wants to have a very good understanding of machine learning. A little bit of advice, if you have never learned linear algebra on a university level, you should at least try to get a basic understanding of it before starting this course. I was happy that I remembered stuff, learning it from scratch in 1 or 2 weeks would be difficult, I assume.
* Mathematical basics of machine learning are very well explained
* Andrew Ng is a very good professor, he explains the topic very well and thoroughly
* It is not limited by using a special framework or language
* The support in the forums, and the transcription of the talks, and all the material that is given to you is really excellent.
* I would be happy if the programming exercises would be a bit more fun, currently it feels like translating / transforming math formulas into octave, which is fine, but not very fun. Having said that I am only in week 4, perhaps this will happen later
* some text questions in the multiple choice quizzes require a precise understanding of the english language, especially in regards to math, I am not a native speaker, so these questions feel especially hard for me