# Prerequisites

This book assumes a basic understanding of the R language. If you like my style of pedagogy, you could try watching my introductory video lectures. Otherwise, review the R learning options at flowingdata.com.

The R `lodown`

package depends on most of the packages used in this text, so these three lines should install many of the R packages presented here, including the `survey`

and `RSQLite`

R packages. Windows users may need to install the external software Rtools prior to installing `lodown`

from github.

```
install.packages( "devtools" , repos = "http://cran.rstudio.com/" )
library(devtools)
install_github( "ajdamico/lodown" , dependencies = TRUE )
```

The survey microdata presented in this book require the R survey package by Dr. Thomas Lumley at the University of Auckland. Dr. Lumley wrote a textbook to showcase that software.

The R `convey`

package estimates measures of inequality, poverty and wellbeing. Guilherme Jacob, Dr. Djalma Pessoa, and I have written this book about inequality measurement with complex survey microdata to accompany the software.

`install.packages( "convey" , repos = "http://cran.rstudio.com/" )`

The R `srvyr`

package by Greg Freedman Ellis allows dplyr-like syntax for many `survey`

package commands. For detailed usage examples, review his vignettes.

`install.packages( "srvyr" , repos = "http://cran.rstudio.com/" )`