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获取和整理数据, 约翰霍普金斯大学

4.6
5,991 个评分
930 个审阅

课程信息

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....

热门审阅

创建者 BE

Oct 26, 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.

创建者 DH

Feb 02, 2016

Easy, mostly instructive Course. The Assignments and quizzes are quite good, and illustrates the lessons very well.\n\nSee the videos for general presentation, but use the energy on the excersizes.

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893 个审阅

创建者 Amy Binny Philip

May 25, 2019

The assignment was quite challenging bu the course overall was very good. The course was structured very well.

创建者 Nino Požar

May 24, 2019

A bit tough course with topics of getting the data since I don't know much about file types, but cleaning part is a must do for every data scientist. dplyr and tidyverse is the base of R and nowadays I only use dplyr for my data wrangling. Highly recommendable course and specialization.

创建者 Kelly Schumann

May 22, 2019

I really liked this course and believe that my work, although seemingly noob-ish, will get much better as I see others works from the peer review and examples noted in the lessons.

创建者 Jean-Philippe Maillard

May 20, 2019

Great course but would benefit of more hands on exercises done by the teacher during the lectures.

创建者 Marina Kingsbury

May 17, 2019

This course was very helpful and easy to follow.

创建者 Laurent risser

May 16, 2019

Good courses, I learned a lot!

创建者 Ловягина Юлия Алексеевна

May 16, 2019

C

创建者 Rok Bohinc

May 15, 2019

The course has valuable content, but there is not enough emphasis on how to create a tidy data set. You kind of learn what a tidy data set is (although the definition is vauge), but you would need to see examples of messy data sets and how to convert it to tidy data set. There is one exercise in swirl called tidyr that addresses that, but it would be nice to have also videos on this topic.

创建者 Mohammad Amir Aghaee

May 13, 2019

There's too much of a jump from the theory to the practice. I had a difficult time understanding what was being asked of me.

创建者 Marcos Aloise

May 12, 2019

Good