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.
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.
By 倪育飞
•It gave me an overview of how to getting and cleaning data.The course is best suited for anyone who is a novice in data science
By Massimo M
•Great course, everything is well explained ant the exercises are challenging enough to really understand what you are studying.
By Shelby B
•I am so glad this course was available. Otherwise, I would noy have had an opportunity to build a data set in my everyday work
By Brayan S O P
•It is an excellent course with all the basics and more that one needs to get started with the acquisition and cleaning of data
By Ajinkya D
•Good course material. A very good project at the end of the course that gave an idea about cleaning a real life huge dataset
By KELVIN H
•good course for learning about tidy data. But have to say that the instructions for the coursework is not exactly very clear.
By Igor T
•Really great course which helps to understand basics of data tidying. I've also enjoyed regex explanation, it's really clear!
By Victor A d S P
•Great course, some background needed. If you are taking the Data Science specialization program, then this is a great catch.
By William H
•Thank you for the case study, very valuable to me to see how you downloaded all the data and began your exploratory analysis
By Bill S
•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.
By Jim M
•The content is very important when working with Big Data, yet I think JHU is unique in the importance paid to the concepts.
By Sebastian O V
•Great course teaches intermediate and andvanced skills to manipullate and clean data. Begginers should make an extra effort
By James L J J
•The Value of the course is in the course projects. I found that working through them really accelerated the understanding.
By xun y
•Great course, providing very useful information. It might be better to provide few examples for codebook and readme files.
By João A P B
•Amazing course! Even after a few years using R in a daily basis, I still learned quite a bit of new / useful information.
By David R
•Great course covering a wide range of data types likely to be encountered in the field of data science. Well explained.
By Anne M
•Really great class. I found the lectures easy to follow. The quizzes and homework helped me master the course material.
By Andrés H V
•I believe it was a very good course ,challenging and interesting. As a beginner in Data Science and R I learned a lot.
By Cathryn S
•A good course, which helped me understand how to get data off the web and from other sources, and improved my R skills
By Nelson S S
•Excelente Curso.
Muchas gracias por compartir sus conocimientos y el gran aporte que hacen en éstas épocas de pandemia
By FARZAD R
•This course is very interesting, useful and practical
I appreciate for all of efforts of my professors in this course
By Pitchayen S
•Very fundamental things that all data scientist must learn. You will know how useful of data.table and dplyr package.
By Anastasia T
•Interesting, challenging course. Opened lots of questions to the topic and gave a good direction to find the answers.
By Cristóbal A
•Entrega conceptos y herramientas útiles. El material es de buena calidad y es presentado de una forma bastante clara.
By Suryadipta D
•Very simple and introductory course that teaches the concepts really well. Forms a brilliant specialization course.