CRG Introduction to R 2018

Day 1
- Introduction to R Studio
  We will use the R Studio of the CRG server (http://rstudio.linux.crg.es). We will go through what can be done with R Studio, from file and folder manipulation/navigation, to getting help on R functions.
- Paths / directories
- Basics of R: syntax, create an object, manipulate the object, simple arithmetics.
- Functions usage in R
  Arguments. Get help.
- R scripts: write and save commands, run them as a block. Comment code.
- Data types.
- Data structures:
  - Vectors
    Basic (and most important) data structure in R. We will learn how to create, modify, subset, manipulate, compare vectors.
  - Introduction to factors: categorical vectors.

Day 2
- Missing values: how to deal with NA values.
- Matrices & data frames
  2-dimensional objects: how to create, subset, select, manipulate.

Day 3
- Input / output
  Reading in and writing out files. Adapting I/O to file format.
- Library / packages
  Install and load packages. Look for functions in those packages.

Day 4
- Basic plotting (base graphics package)
  Scatter plots, boxplots, barplots, pie plots, histograms.
- Introduction to ggplot2 package
  ggplot2 provides functions for creating and customizing plots. We will learn the basic structure and how to produce simple plots.
- Input / output
  We will save plots as files in different formats, both from R Studio and from the terminal.

Contents