(I) Statistics– Introduction to RProf. Dr. Jan Kirenz

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Why we want to use R instead of SPSS

• It is one of the most important tools in statistics (in academia and companies)

• It is a free open source soulution –students can use it at home

• It is far more powerful than SPSS (especially in terms of data explorationand visualisation)

• Students learn to code and acquire basicskills in the field of data science

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Programming Language R

Companies Using R

• R is a language and environment for statistical computing and graphics.

• It is one of the most important tools for computational statistics, visualization and data science.

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Introduction to R Programming

l With over 2 million users worldwide R israpidly becoming the leading programminglanguage in statistics and data science.

l Every year, the number of R users grows by40% and an increasing number oforganizations are using it in their day-to-dayactivities.

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Source: Cornelissen, J. (2016). Datacamp. Retrieved from URL https://www.datacamp.com/courses/free-introduction-to-r

Source: KDnuggets Analytics/Data Science 2016 Software PollSoftware usage for Analytics/Data Science (2016)

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R Data Visualisations

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R Data Visualisations

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Interactive R Dashboard Solutions

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Introduction to R Programming

l In this introduction to R, you will master thebasics of this beautiful open source language, including factors, lists and data frames.

l With the knowledge gained in this course, you will be ready to undertake your first very own dataanalysis.

l Start course:l https://www.datacamp.com/getting-

started?step=2&track=r

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DataCamp free interactive course

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Introduction to R Programming

l swirl teaches you R programming and data scienceinteractively, at your own pace, and right in the R console!

l How to install Swirll http://swirlstats.com/students.htmll Install Swirl:l Open RStudio (or just plain R if you don't have RStudio) and type the

following into the console:l > install.packages("swirl")l Note that the > symbol at the beginning of the line is R's prompt for you

type something into the console. We include it here so you know thatthis command is to be typed into the console and not elsewhere. The part you type begins after >.

l Start Swirll This is the only step that you will repeat every time you want to run

swirl. First, you will load the package using the library() function. Then you will call the function that starts the magic! Type thefollowing, pressing Enter after each line:

l > library("swirl")l > swirl()

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Swirl – Learn R, in R

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Introduction to R Programming

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Useful ressources

Grolemund, G & Wickham, H. (2016). R for Data Science. http://r4ds.had.co.nz/introduction.html

Irizarry, R. A. & Love, M. I. (2015). Data Analysis for the Life Sciences. https://leanpub.com/dataanalysisforthelifesciences

Teetor, P. (2011). R Cookbook. Sebastopol, CA: O’Reilly Media. http://ase.tufts.edu/bugs/guide/assets/R%20Cookbook.pdf