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

4.5
étoiles
7,938 évaluations

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.

See the videos for general presentation, but use the energy on the excersizes.

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201 - 225 sur 1,278 Avis pour Obtenir et trier des données

par KELVIN H

25 mars 2018

good course for learning about tidy data. But have to say that the instructions for the coursework is not exactly very clear.

par Igor T

8 janv. 2017

Really great course which helps to understand basics of data tidying. I've also enjoyed regex explanation, it's really clear!

par Victor A d S P

12 déc. 2019

Great course, some background needed. If you are taking the Data Science specialization program, then this is a great catch.

par William H

5 août 2019

Thank you for the case study, very valuable to me to see how you downloaded all the data and began your exploratory analysis

par Bill S

25 mai 2017

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.

par Jim M

26 avr. 2020

The content is very important when working with Big Data, yet I think JHU is unique in the importance paid to the concepts.

par Sebastian O V

6 août 2018

Great course teaches intermediate and andvanced skills to manipullate and clean data. Begginers should make an extra effort

par James L J J

26 déc. 2019

The Value of the course is in the course projects. I found that working through them really accelerated the understanding.

par Xun Y

10 juil. 2017

Great course, providing very useful information. It might be better to provide few examples for codebook and readme files.

par João A P B

25 févr. 2017

Amazing course! Even after a few years using R in a daily basis, I still learned quite a bit of new / useful information.

par David R

3 sept. 2018

Great course covering a wide range of data types likely to be encountered in the field of data science. Well explained.

par Anne M

10 janv. 2016

Really great class. I found the lectures easy to follow. The quizzes and homework helped me master the course material.

par Andrés H V

28 juin 2020

I believe it was a very good course ,challenging and interesting. As a beginner in Data Science and R I learned a lot.

par Cathryn S

2 janv. 2017

A good course, which helped me understand how to get data off the web and from other sources, and improved my R skills

par Nelson S S

10 nov. 2020

Excelente Curso.

Muchas gracias por compartir sus conocimientos y el gran aporte que hacen en éstas épocas de pandemia

par FARZAD R

26 févr. 2017

This course is very interesting, useful and practical

I appreciate for all of efforts of my professors in this course

par Pitchayen S

14 févr. 2017

Very fundamental things that all data scientist must learn. You will know how useful of data.table and dplyr package.

par Anastasia T

19 oct. 2016

Interesting, challenging course. Opened lots of questions to the topic and gave a good direction to find the answers.

par Cristóbal A

2 avr. 2016

Entrega conceptos y herramientas útiles. El material es de buena calidad y es presentado de una forma bastante clara.

par Suryadipta D

28 mars 2018

Very simple and introductory course that teaches the concepts really well. Forms a brilliant specialization course.

par Steven C

15 mars 2017

Great coverage of useful R libraries for retrieving and tidying up data, and difficult but valuable course project.

par Peter

22 mars 2016

Very good class for a beginner. Helps become more comfortable with R programming and aspects of getting data into R

par Vivek G

8 nov. 2019

Challenging course for working professionals from time perspective but very educative and useful. I learned a lot.

par Vipin J

20 nov. 2018

A must take course for data science carrer... Very good concept explaination with really good hands on with Swirl.

par Philip S

9 juil. 2018

Excellent survey of data cleaning methods, good grounding in tidyverse tools, builds nicely on previous 2 courses.