Really great course which helps to understand basics of data tidying. I've also enjoyed regex explanation, it's really clear!

Great course, some background needed. If you are taking the Data Science specialization program, then this is a great catch.

Thank you for the case study, very valuable to me to see how you downloaded all the data and began your exploratory analysis

I greatly enjoyed this course and I really got a lot of hands-on practice that I can apply in a real-world work environment.

The content is very important when working with Big Data, yet I think JHU is unique in the importance paid to the concepts.

Great course teaches intermediate and andvanced skills to manipullate and clean data. Begginers should make an extra effort

The Value of the course is in the course projects. I found that working through them really accelerated the understanding.

Great course, providing very useful information. It might be better to provide few examples for codebook and readme files.

Amazing course! Even after a few years using R in a daily basis, I still learned quite a bit of new / useful information.

Great course covering a wide range of data types likely to be encountered in the field of data science. Well explained.

Really great class. I found the lectures easy to follow. The quizzes and homework helped me master the course material.

I believe it was a very good course ,challenging and interesting. As a beginner in Data Science and R I learned a lot.

A good course, which helped me understand how to get data off the web and from other sources, and improved my R skills

Excelente Curso.

Muchas gracias por compartir sus conocimientos y el gran aporte que hacen en éstas épocas de pandemia

This course is very interesting, useful and practical

I appreciate for all of efforts of my professors in this course

Very fundamental things that all data scientist must learn. You will know how useful of data.table and dplyr package.

Interesting, challenging course. Opened lots of questions to the topic and gave a good direction to find the answers.

Entrega conceptos y herramientas útiles. El material es de buena calidad y es presentado de una forma bastante clara.

Very simple and introductory course that teaches the concepts really well. Forms a brilliant specialization course.

Great coverage of useful R libraries for retrieving and tidying up data, and difficult but valuable course project.

Very good class for a beginner. Helps become more comfortable with R programming and aspects of getting data into R

Challenging course for working professionals from time perspective but very educative and useful. I learned a lot.

A must take course for data science carrer... Very good concept explaination with really good hands on with Swirl.

Excellent survey of data cleaning methods, good grounding in tidyverse tools, builds nicely on previous 2 courses.

was a hard module for whose isn't a programmer, but was well done structureted to easy learning with hard studying