This course provides an introduction of some important concepts and tools on a very important aspect of data science: cleaning and organizing data before any analysis. A must for any data scientist.
Easy, mostly instructive Course. The Assignments and quizzes are quite good, and illustrates the lessons very well.\n\nSee the videos for general presentation, but use the energy on the excersizes.
von Andrew T•
Too much talking. Not enough integrated exercises.
von Ryan W•
Mostly just R programming with data science in passing.
von Thomas G•
Very usefull but can be technical and discouraging
von BIBHUTI B P•
needs little more real time scenario examples..
von Pedro V Q d C•
Course is too simple, should be more extensive.
von Madhubalini V•
practices is much needed to complete projects.
von Dr. M H A J•
Amazing, Kindly update the versions always.
von Ahmed A•
I THINK THE COURSE NEED TO BE UBDATED
von Ivo G G V•
It needs an update on some libraries.
von Mario P•
Useful, but a little boring.
von KIM D H•
its so hard for beginner to
von Antoine D•
Interesting but too simple.
von Liliana B S•
Sometimes is hard to follow
von Dinesh B•
The assignment was tough.
von Hussien E•
A little hard to follow
von Naman D D•
Too much repetittion.
von Sujeet S•
von Mike E•
Professors did not do a lot beyond rehearsing what the commands did. More important, there were a lot of small things that would stop progress on the course unless you went deep into the forums - for instance, one of the files in the final project was illegible unless you used the right text editor. Final project was poorly designed in that the data were untidy but intended to stay that way (See "Should I decompose the variable names?" in Thoughtful Bloke's post at https://thoughtfulbloke.wordpress.com/2015/09/09/getting-and-cleaning-the-assignment/ - he is right about jerk and mag but wrong about time/freq, gravity/body, acc/gyro, and x/y/z, which are mutually exclusive members of the same set and thus values that appear in column names). I appreciate that this course, unlike other online courses, actually makes you think, but students should only have to think about topics germane to the course. Overall much more frustrating and time-consuming than it should have been.
von Bill C•
This course is where the material starts to get difficult, and the learning materials fail to provide the structure needed. There absolutely HAS to be a better teaching method than "reading the slides of bullet-ed text that I'm also showing". No functional examples are provided in the lectures and the real learning content is linked out to web resources. You will have to Google your way through this class because the provided instruction will not contain answers to the quiz or exam questions. A real disappointment.
I also think that Coursera knows this, because this was the first course where they ramped up the e-mail encouragement campaign. Their data must tell them this is where people fall off the specialization. Rather than addressing with marketing and messaging, they should encourage the instructors to improve the course.
von Marcelo S•
There is a lot of room for improvement. In an ironic twist, since the course is about "cleaning data," we are left to our own devices figuring out a lot of this very outdated material, broken links, codes that don't work, etc, so we have to google and search StackOverflow and forums to fill in the gaps and create a better course. I was subsequently asked to be a Mentor in the course, but I would rather the author of the course revise it, instead of having us work for free trying to help people get through outdated material. All the help is in the discussion forums already anyway, so I'm not sure why they need more Mentors. The saving grace of this course is that you will learn, if you are desperate to learn, and it is part of a greater Specialization that is worth your time.
von Marc F•
I believe this course suffers from neglect. Rarely did I see any of the mentors participating in the group discussions even though there were plenty of questions. Furthermore, some of the quiz questons seemed incomplete or confusing. The project was no better. I feel like the course was recorded a few years ago, and not much done after that to fix flaws, even though they are probably well known. The material is useful, but it would be nice to have a set of notes or a text to go with the lectures. You will spend a lot of time searching the internet to compelte the assignments. Sometimes that is good, but other times a guide geared to the course would have been better.
von Thaer Z•
I am done with this course. every week is the same thing. the lectures are a long list of references to other references. The quiz questions can not be answered without spending hours troubleshooting RStudio or searching the forum for help and hints to find out why the loaded packages or functions are not found. The quiz recommends to load packages that don't work or have dependencies that are no longer valid. I wanted to take this specialization to learn new data analysis techniques. if I wanted to spend my time searching the internet for answers I can do that without paying monthly fees. Good luck everyone. I am done. I will try a different course or field of interest.
von Greg R•
The methodology of getting and cleaning data was good but the course materials were lacking and really outdated. Some of the material is 5+ years old and reference deprecated packages and functions or includes links to sites that have been long updated or no longer exist. I found myself spending a lot of time doing my own research on what packages to use. There is value in that.
The quizzes and assignments cover good topics but the instructions are pretty unclear as to what the ask actually is. It takes a lot of independent research and combing through the forums to gain clarity. It is very time consuming.
von Willie C•
Not a great course. The lecture videos were dull and not very informative, and did not do a good job of preparing you for the quizzes at the end of each week. The lecture videos mentioned and linked to a number of external resources, but you couldn't click on the links through the videos, so that wasn't useful. The forums were much more helpful than the lecture videos when it came to teaching you what you needed to know. I understand why a course like this is essential to the Data Science specialization, but I feel like this content could've been covered in a much more engaging and instructive manner.
von Matt B•
Have to say, very disappointed when comparing this to the first course. The first course teaches you the concepts and the quizzes/projects give you a great environment to learn new concepts while proving knowledge of the previous ones. This course so far has 20is minutes of videos per week that teach you 60% of what you need for the quizzes, especially true for the second week. Save time and use another resource for learning about APIs and other data resources.