R-users group
R-in-Grenoble is the R users community in Grenoble. Anyone is welcome to join to learn about R and exchange with other users on R issues. Monthly working sessions are organised.

Each month, the Grenoble R-group organizes working sessions of 2 hours, one Thursday per month, from 16h-18h, at the IMAG building.

Everyone is welcome from beginners to advanced R users. Participants just need to bring their laptop. Presentations or tutorials will last 30 to 60 min, on R topics that can be useful to many people, with practical examples. During the second part of the session, specific problems encountered by participants when coding in R will be discussed.

Drinks and snacks are served during the second part of the sessions.

Upcoming sessions
Date Title Speakers
September 28, 2017 Introduction to R F. Chuffart & F. Boyer
This first R working session will be an introduction to your favourite statistical programming language: R. After a brief introduction to basics (user interface paradigms, free software and GNU), we will go deeply into the details of data structures, data indexing and data visualisation. The main purpose of this session is to offer a not only simple but also powerful alternative to your classical spreadsheet software. This introduction gives you the keys to perform large scale statistical data analysis.
October 19, 2017 ggplot2 F. Privé & K. Caye
You all know the package ggplot2 from Hadley Wickham. It is reputed to make nice plots that could be used in publications, for example. It is also reputed to be hard to begin with or to customize. We will explain the reasoning behind ggplot2 and the use of tidy data which is important to understand in order to master ggplot2. We will also show the common problems an R user could face when using ggplot2 (and their solutions). There will be a lot of nice plots :-)
November 16, 2017 igraph A. Achard & ...
December 14, 2017
Geographical Information Systems F. Boyer & ...
January 18, 2018
RStudio and git F. Privé & M. Richard
RStudio is an integrated development environment (IDE) that facilitate the life of R users. We will show some of the tools that are provided by the RStudio IDE that could help you save some precious time and effort. Two of these tools are the integration of Git and the R projects. We will see in particular how these two tools are integrated in RStudio and how much is it important to work with them. Make sure you have the latest version of RStudio and git installed (https://support.rstudio.com/hc/en-us/articles/200532077-Version-Control-with-Git-and-SVN).
February 08, 2018
Best coding practices A. Arnaud & ...
March 15, 2018
Rcpp F. Privé & A. Arnaud
Your code isn't fast enough? We will see how to make simple Rcpp code to accelerate your code. We will see that Rcpp is useful for loops, for avoiding copies, etc. We will also see that Rcpp isn't always faster than an optimized R code. Finally, we will see how to integrate some Rcpp code to your packages and notebooks.
April 26, 2018
Parallel computing F. Chuffart & L. Viry
May 24, 2018
Out of memory matrices F. Privé & ...
In this session, we will talk about the package bigstatsr. The package bigstatsr provides a special class of matrix than can be used to store some data in a matrix-like format on your disk but to access it almost as if it were in memory. It is particularly useful is you have a large matrix to analyze but not enough RAM on your computer. We will then see the statistical and helper functions that are provided by the package bigstatsr for this kind of matrices.
June 14, 2018
Make your personal webpage with R F. Privé & M. Richard
You know nothing about web development? Me neither (at least when I came up with this solution). In this session, you will learn how to make your personal website with only R code in only a few minutes. For example, the site of our group is made with this R solution.

Published on September 15, 2017