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获取和整理数据, 约翰霍普金斯大学

4.6
5,669 個評分
896 個審閱

課程信息

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....

熱門審閱

創建者 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.

創建者 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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859 個審閱

創建者 Jagat Ram Semwal

Feb 17, 2019

Great learning! Thank you.

創建者 THI A ALLGOOD

Feb 17, 2019

Swirl practice in for Getting and Cleaning Data in this class is terrible. Most of my code working fine in R and R studio but Swirl would tell me "That's not the answer I'm looking for, try again" Then I type "skip()" Swirl will give me the exact answers that I just typed earlier.

創建者 Nimalka Weerasuriya

Feb 13, 2019

Useful general course on tidying data and learning to import into R from various sources. Doesn't get into sequencing data import, but looks at other common ones

創建者 Hathairat Wittayapusagul

Feb 09, 2019

A very Important course for working with R and data science in general.

創建者 David Searl

Feb 05, 2019

Better than R Programming. Still very hard, but worthwhile.

創建者 Ehab H Abdelhamid

Feb 05, 2019

This course was too hard for me compared to the first two in the program. Not sure whether it is because of my limited background in the subject area, or because of the abrupt shift in level from course 2 to 3.

創建者 Parker Oakes

Feb 05, 2019

Fantastic course!

創建者 Anthony J Maddalone

Feb 01, 2019

There is a huge disconnect with the material and the HAR dataset exercise. I would suggest that there is some help with smaller exercises to help explain how to complete it. Yes, I know you're supposed to do research to help figure out problems, and I have. As a matter of fact, I have taken other courses on data wrangling to be able to figure out this problem. Merging two datasets makes this problem very confusing. Why can't you help guide students through a similar problem, instead of throwing to the fire?

創建者 Felix Ruecker

Jan 31, 2019

Ups and Downs.

Some presented functions are deprecated according to official documentation...

創建者 Aman Ullah

Jan 30, 2019

Just Amazing, one should take this course for betterment