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

7,923 ratings
1,310 reviews

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.


Oct 25, 2016

This course is really a challenging and compulsory for any one who wants to be a data scientist or working in any sort of data. It teaches you how to make very palatable data-set fro ma messy data.

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1001 - 1025 of 1,273 Reviews for Getting and Cleaning Data

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.

By Guillaume H

Dec 2, 2016

Useful technics to make things workable

By Tharindra P

Apr 15, 2020

Great content and hands on experience.

By Ada

Nov 14, 2016

Well done. Thanks for a good course.

By Lluís G

Nov 8, 2016

Nice set of techniques and methods!

By Jehan H

Jan 11, 2020

The course has useful information.

By John B

Oct 10, 2020

Guidance and instruction is good.

By Rajib K

Feb 26, 2017

need to be crisped, over all good

By Paras B

Apr 7, 2018

Great course for the beginners!!

By Shahrokh N

Feb 10, 2018

Nice course and worth taking it.

By Hakan S

Oct 24, 2020

One of the best of Data Science

By Joseph L

Sep 15, 2020

Videos weren't detailed enough.

By Laurent r

May 16, 2019

Good courses, I learned a lot!

By Amanyiraho R

Jan 13, 2020

Best data cleaning technique.

By Nicholas C

May 29, 2019

Too much outdated content.

By Fernando M

Sep 4, 2017

Really important tools!!

By César A C

Jun 5, 2017

Very interesting course.

By Chirag R

Jun 28, 2019

Good course. Thank you!

By Sisi H

Sep 9, 2019

Overall a solid class

By Seunghak J

Jun 4, 2017

Very practical course