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Learner Reviews & Feedback for Getting and Cleaning Data by Johns Hopkins University

8,004 ratings

About the Course

Before you can work with data you have to get some. This course will cover the basic ways that data can be obtained. The course will cover obtaining data from the web, from APIs, from databases and from colleagues in various formats. It will also cover the basics of data cleaning and how to make data “tidy”. Tidy data dramatically speed downstream data analysis tasks. The course will also cover the components of a complete data set including raw data, processing instructions, codebooks, and processed data. The course will cover the basics needed for collecting, cleaning, and sharing data....

Top reviews


May 2, 2020

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.


Feb 1, 2016

Easy, mostly instructive Course. The Assignments and quizzes are quite good, and illustrates the lessons very well.

See the videos for general presentation, but use the energy on the excersizes.

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1001 - 1025 of 1,296 Reviews for Getting and Cleaning Data

By Federico G

Aug 20, 2019

I think using python would have been a better option than R

By Prashant K

Mar 15, 2018

Videos can be bit more detailed (similar to the R program)

By Hung P

Jun 3, 2020

A little bit out-dated, but very useful. I learned a lot.

By Brett W

Sep 15, 2017

I liked this course, particularly with the SWIRL support.

By Andres M

Feb 18, 2016

Some thing were very dificult and i needed more research

By Erik P

Sep 28, 2016

Great Course!

The Course Project was really challenging.

By Nitin P

Jan 29, 2016

I thoroughly enjoyed the course project. Overall, It

By Raul M

May 18, 2017

Very interesting and useful for improving knowledge

By Kelly M M

Jul 19, 2017

Great course. Went a little fast, but they all do.

By Björn L

Jul 8, 2019

Good course which covers quite a lot of material!

By 李俊宏

Sep 15, 2017

good! but I hope that Jeff can make more examples

By Laura B

May 18, 2017

Good but needed more info to complete assigments.

By Shivanand R K

Jun 21, 2016

Great and Excellent thoughts and course material.

By Yunfan T

Jul 28, 2017

the course lecture is not enough for assignment

By Marina V V m

Dec 20, 2018

More swirl exercises! They are really helpful

By Manny R

Aug 10, 2017

Time consuming and Challenging but very good.

By Patrick B

Nov 19, 2019

Challenging assignment. Interesting material

By Gustavo P

Sep 26, 2018

Good course, but se subject, not so mutch...

By Alex s

Dec 28, 2017

The last project instructions were unclear.

By Mehul P

Sep 10, 2017

Nice explanation on cleaning data activity.

By Niranjan

May 22, 2017

Great course materials!! Great effort!! :-)

By Marcos A V

May 15, 2017

I've learned much about reading data in R!

By Daren T

Feb 8, 2016

was tougher than expected. i learnt a lot!

By Chong C F

Sep 7, 2016

Well pack, but could have more practice.

By Andrew K

Jun 9, 2019

The class could have better uniformity.