Excellent course. This course is seriously exciting throughout !!!

very clear, many examples and good exercise, assignments

thank you

Should be before the 'R Programming' course - eases you in nicely.

a must have course before applying any math model to our data! :-)

Very good course and first real challenge in this specialization.

great class for anyone learning the R language and data analytics

Really good for folks, who wants to learn data manipulations in R

Good one.... teaches you good skills to handle data and stress :)

This whole specialization is very informative! Highly recommend!

Muy interesante, bastante información y todo muy bien explicado

Thank you very much for letting me do this course. Learned alot

It's a useful course but the final assignment is real hard hah.

Solid fundamentals gained from this course on data manipulation

Great use of R. It really helped solidify what I learned there.

Very nice course, and clear how to do it. I like it very much!

Good Course. It gives an idea on how to prepare tidy data set.

It is great to know how the cleaning process is performed in R

Extremely well designed. The knowledge is very well imparted.

The best course I have already done about data preprocessing!

Great course for getting to know different places to get data

Very nice and highly recommended training or data scientists.

most important course for simple cleaning pls dont omit swirl

This is a great course! I like it. It really helped me a lot.

Good course to learn how to use R to getting and clening data

great starting in the pain of getting data ready to analysis