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

4.5
étoiles
7,922 évaluations
1,309 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

HS

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.

DH

1 févr. 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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1126 - 1150 sur 1,272 Avis pour Obtenir et trier des données

par Andrew C

20 sept. 2016

The best course so far (though that's not saying much). This course would be better as a follow up to an example workflow showing an end to end analysis.

par Amir A S

8 mars 2020

Not on par with the course sets before it, could have been a bit more explaining as cleaning data is one of the most important parts of data science.

par Ranto R

6 juil. 2020

The content of the course is very interesting and useful. However, I found very challenging the difference between lectures and quizzes/assignements

par Bijan S

30 janv. 2016

The selection of topics is great. However, the course is too abstract. I think some of the materials deserve to be discussed more comprehensively.

par Paymon H

14 avr. 2016

Toughest class in the offering. There really could've been 2 classes for cleaning data. I struggled with the lecturer's style (spoke too fast).

par nicolas r

15 sept. 2021

S​ome assessments are not well related with topics developed during classes. Then, it is difficult to understand what it is the goal to achieve.

par Daniel D

3 sept. 2019

The project description could have been a lot more descriptive for what we were supposed to do. Otherwise, I had a lot of fun with this section.

par Teodor I

9 janv. 2018

The non-clickable links in the pdf are a major problem. You need to figure it out. Create a link reference field for each video or something.

par Nishi G

27 avr. 2017

To get value from the class, I used other on-line materials to understand the topic. Thus, I spent about 20 hours/week on this class.

par Paul M

15 mai 2018

I felt I had to teach myself in this course. I feel I would have had the same learning experience if I had purchased a good R book.

par Richard C

10 mai 2018

A lot of things covered in this course in a short time. Probably should have been 8 weeks with more homework done step by step.

par Siarhei K

16 mars 2021

great materials but unrelated to assignments. great real life experience "here is link. make it nice. deadline yesterday"

par Diana L G

18 mai 2020

Sometimes I felt the were not evaluating my learning or ability to do things but my ability to read instructor's mind.

par Hassan D

17 avr. 2020

it gives us good information, but the information sometimes are incomplete or need to be updated( created in 2014!)

par Archana R

31 août 2016

good course. but some concepts are hard to understand for newbies. so felt it was a bit advanced in parts.

par Angel_Eyes E

3 déc. 2021

course material was not clear and precise ..wish it was more explanatory to get our concepts more clear

par Sudarshan C

1 mars 2016

The materiel covered in the course was great, but more assignments instead of quizzes should be added.

par John G

23 févr. 2017

Materials (video and written) only partially prepare the student for the quizzes and course projects.

par Lam C M

19 mars 2018

Not as clear and straightforward as R Programming. But definitely a worthwhile course to look at.

par teena g

9 févr. 2018

While the available content is good, I expected this course to take me to a more detailed level.

par Felix R

31 janv. 2019

Ups and Downs.

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

par Mohammadreza A

20 déc. 2020

Course project was really vague and it took me 3 days to understand what is really wanted

par Brandon W

11 août 2020

The lessons are good, but they do not prepare you for the tests or end-of-course project.

par Nathan H

17 sept. 2018

The assignments required A LOT of help outside the information provided in the lectures.

par Jack H

1 juin 2020

Not as good as the other courses offered by this specialisation. In need of an update!!