**#7**in category R

This course covers the essential exploratory techniques for summarizing data. These techniques are typically applied before formal modeling commences and can help inform the development of more complex statistical models. Exploratory techniques are also important for eliminating or sharpening potential hypotheses about the world that can be addressed by the data. We will cover in detail the plotting systems in R as well as some of the basic principles of constructing data graphics. We will also cover some of the common multivariate statistical techniques used to visualize high–dimensional data. The mission of The Johns Hopkins University is to educate its students and cultivate their capacity for life–long learning, to foster independent and original research, and to bring the benefits of discovery to the world.

## Instructor Details

**Roger D. Peng, PhD**

Courses : 4

## Specification: Exploratory Data Analysis

Duration | 15 hours |
---|---|

Year | 2015 |

Certificate | Yes |

Quizzes | Yes |

## 50 reviews for Exploratory Data Analysis

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amir s–very good course

Gary T–I learned a lot, this course more than others, really expanded my competence and appreciate for the capabilities of R, especially is visualization toolbox.

Henrique R G–Thank you for opportunity to improve each day.

Esther L–Too weak regarding the clustering methods, very disappointed.

Mehrdad P–The course was overall ok, but I wish discussions about k–means, PCA and SVD were divided into two courses.

Farah N–I enjoyed taking this course specially the projects and swirl practice. If the clustering were a bit detailed, it would be useful. Also we could do a project using the 3 different approaches, it would be interesting. Nevertheless, it was fantastic with the amazing professors.

FAIZAN D–The course is very useful

Arne S–did not like the swirl–tutorials. they were very tedious and sometimes labelled correct commands as false (e.g. when you typed instead of <– for assigning a value to a variable) also I was surprised that for a beginner programming course in R you had to apply specific functions such as grepl without the function being introduced in the course

Ross D–Was a little perplexed that we did not address clustering at all in the assignments.

Jakub K–Perfect and thank you

claire b–Course gives thorough introduction to basic tools for exploratory data analysis, including visualisation, PCA and clustering. Good mix of lectures, practical in swirl and programming assignment. Swirl practice are mostly a repetition of the examples in the presentations, which is a bit of a pity…and I missed a programming assignment on cluster analysis/PCA

Angela C–The BEST course in the series by far. You finally get your hands on some data.

Muhammad Z H–Learnt a lot

Onedio S S J–Excelent course!!!! Congratulations!!!

Manuel M M–It is a good course but in my opinion it is basically support with the R swirl() guide

Leonie L–Really good Course!

David W–Excellent Course detailing graphics in R

kajal s–Exploratory data analysis is a very important skill and it is a very good course to learn it.

Luiz E B J–I would rate 5 if the course wasn’t so focused on graphic analysis. But, even Like that it’s a very good experience.

Ratanaporn–I am pleased with the success. In completing the course

Pitak P–Good

Shubham S–Thank you so much instructors, the learning curve till now has been great for me.

Nilrey J D C–This is a good introduction to do EDA using R.

Nayankumar G P–Good course for beginners

Nikhil J–Very useful class, I have already started using the learnings. Its easy and quick to understand.

Tristan F–Roger is the man!

Robin A–It was indeed a nice learning through out the course

Luke S–Good introduction. The swirl exercises kind of reproduce the lectures though– felt like it might not have been the most efficient use of time to go over the exact same example again.

Alexander D–i very much like the course book. The course book helped me most in really learning the material and how to build plots.

Trevor G–Great course for learning the plotting mechanisms of R

Johnnery A–Excelente

Marcela Q–Really good if you do not have any background in the field. But even if you do it is a great review

JiapengSun–Very good

Edward A S M–Good

Elaine E–I think this was a great intro course to graphing and exploring data!

Daniel P–I’ve learned plotting in R. I expect to learn more in four weeks of “Data Science” specialization.

Alan C–Decent overview of the graphing fundamentals in R

Mathew K–Great intro to plotting and related tools in R. Will say that the coverage of heatmaps and PCA felt a little out of left field, with very little intuition. However, overall quite good.

Rahul P–Awesome!

Sean S–Excellent! Very challenging and enjoyable.

Dev P–Great course providing a good overview into the various plotting systems in R. I enjoyed the introduction to principal components analysis and singular value decomposition, but could have used more material to practise these methods

James S–This was an excellent class.

Ricardo L–Excelent! Very useful course

Amanyiraho R–Very exciting, Did you Know that just by exploring your data can help you reduce the list of models you want to try out

ONG P S–As an auditor, this course taught me to see things more clearly from different angle.

Rui W–Awesome Course!

Rob S–Very good resume of the previous lessons, you lear plotting, charts, working with big matrices, create a good practical workflow to understand your first analyses

Vishal–this course was very good. Helped me a lot.

Kunal P–Little time consuming but a great course.

Rosa C V–Me encanto el curso! Buenos profesores, el curso estuvo modulado de la manera interesante y el ingles estuvo facil de entender. La parte practica me motivo a poder continuar con los siguientes cursos de la especializacion.