• Introduce participants to R programming
• Participants will use the knowledge they have acquired to generate statistical tables
• Use R to analyse and visualised data for report writing

https://github.com/mmollerup/RGhana

Install

• R - https://cloud.r-project.org/ -

  • R is a language and environment for statistical computing and for graphics
  • GNU project (100% free software)
  • Managed by the R Foundation for Statistical Computing, Vienna, Austria.
  • Community-driven
  • Based on the object-oriented language S (1975)

• R Studio - https://www.rstudio.com/products/rstudio/download/#download

  • Integrated development environment
  • Aggregates all convenient information and procedures into one single place
  • Allows you to work in projects
  • Manages your code with highlighting
  • Gives extra functionality (Shiny, knitr, markdown, LaTeX)
  • Allows for integration with version control routines, such as Git.

  Help - is available on the comprehensive R archive

  eg. network(cran). To search for help anova() or ?anova or help(anova)

  Sites such as http://www.stackoverflow.com and http://www.stackexchange.com , as well as Google can be of tremendous help.

  ---

  a< - c(1,2,3,4,5) - vector

  rep(a) —- Replicates table

  Matrix - rectangular arrangement of rows and

  head() - sample of data

  str() - attribute of data

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  https://drive.google.com/drive/folders/15U8WjVKbYXaq6N6Wb_6bCr9QZ1DwCkAO

  • What is R

  The language of data science

  Free and open source

  Optimised for vector operation ( run through series of data without for loops)

  • Installing R

  Visit  R-project.org and download R

  Install R

  The R interface has the

  Script  - view for script

  Console - view of output

  Use # before the start of a row to comment it

  • Test console by using in build data

  Library(dataset)

  • using the iris dataset
  • To view summary of data loaded

  head(iris) - 6 lines of data

  summary(iris) - summary statistics

  plot(iris)- scatterplot matrix

  • Clear workspace

  Detach("package.datasets", unload=True) - clears data

  Dev.off() - clears plot

  Cat("\014")  - clear console (ctrl+l)

  • Rstudio

  Software that makes working with R easier

  Visit Rstudio.com download desktop version and install

  The R Studio interface has

  • Source windows - script input
  • Console - output
  • Environment
  • Plot and other windows
  • Packages

  Bundles of code that give you super powers

  • Base - comes with software
  • Contributed - third party

  Source:

  Cran

  Crantastic! - install.packages("crantastic")

  Github

  Popular packages

  • Dplyr - manipulating database
  • Tidyr - cleaning up information
  • Stringer - working with strings
  • Lubridate - working with dates
  • Httr - working with website data
  • Ggvis - grammar of graphics
  • Ggplot2 - graphics or data visualization
  • Shiny - interactive interface
  • Rio - importing and exporting data
  • Rmarkdown - rich document for sharing information

  Pacman - one package for them all

  • Installing packages

  install.packages("pacman")

  require(pacman)

  library(pacman)

  pacman::p_load(pacman, dplyr, GGally, ggplot2, ggthemes,  ggvis, httr, lubridate, plotly, rio, rmarkdown, shiny,   stringr, tidyr)

  Library(datasets)

  • Clear package

  P_unload(all) - clear all packages

  P-unload(specifice package) - clear specific package

  Detach("package:datasets", unload true) - clear base packages

  • plot()

  Basic x-y plotting

  Adjust to datatype and variables