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Avis et commentaires pour d'étudiants pour Obtenir et trier des données par Université Johns-Hopkins

7,886 évaluations
1,295 avis

À propos du cours

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....

Meilleurs avis

2 mai 2020

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.

25 oct. 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.

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1026 - 1050 sur 1,258 Avis pour Obtenir et trier des données

par Fabio P

14 oct. 2017

A good course

par Sabawoon S

28 juin 2017

Very helpful.

par Venkata N K T

10 mai 2016

Very valuable

par Ted S

31 janv. 2016

Great course.

par Harsha G

3 mars 2016

very helpful


26 mai 2019

good course

par M C

22 janv. 2021

Pretty OK

par Greg B G

3 oct. 2016

very good

par Khobindra N C

18 mai 2016


par Luiz C

16 sept. 2017


par Nithya M

23 juin 2017


par Shreya S

20 mars 2017


par Veena M

21 févr. 2016


par Chuang M

6 févr. 2016


par Marcos A

12 mai 2019


par Nithin k G

16 nov. 2018


par Ashish S

6 févr. 2017


par shipra g

8 août 2016


par Vivek R

7 févr. 2016


par Mrunal 1

8 mai 2021


par Dimitri d

23 févr. 2017


par Sergio R

27 nov. 2016


par sugyoo

22 oct. 2016


par Borja C

7 mai 2016


par Miguel C

25 mars 2020

I really enjoyed and learned a lot in this course.

I feel a lot more comfortable with looking for and reading data. I learned how to clean data and getting it ready for further analysis. I think the course project was particularly good for completely understanding the process of tidying data and all the aspects it involves, such as writing a code book and a README file for accompanying it.

Furthermore, I believe I further developed my R programming skills, by learning how to code new things or things I already knew but in a more efficient way, by using new packages and techniques.

Moreover, I found Professor Jeffrey Leek quite engaging, very easy to understand and I had complete confidence in his knowledge on this subject.

However, I believe the course is slightly outdated. I was often disheartened and frustrated by not being able to replicate what was being done in the lecture videos. For example, there were many links that did not work anymore and sometimes information that simply wasn't correct anymore. I found the discussion forums and many mentors responses to be very helpful. I think this can easily be fixed by writing up an errata or updating the lecture videos.