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R package for data and code used in "Quantitative Social Science: An Introduction"

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Quantitative Social Science: An Introduction
============================================

[![Travis-CI Build Status](https://travis-ci.org/kosukeimai/qss-package.svg?branch=master)](https://travis-ci.org/kosukeimai/qss-package)

An R package containing the datasets used in

> Kosuke Imai. 2017. **[Quantitative Social Science: An Introduction](http://press.princeton.edu/titles/11025.html)**. Princeton University Press.

See [kosukeimai/qss](https://github.com/kosukeimai/qss) for other supplementary materials and the original data sets.

The website for this package is available at [<https://kosukeimai.github.io/qss-package>](https://kosukeimai.github.io/qss-package)

Install
-------

**qss** is not available from CRAN, install the package from github with:

``` {.r}
# if you have not installed the `devtools` package
# install.packages("devtools") 
library("devtools")
install_github("kosukeimai/qss-package", build_vignettes = TRUE)
```

Usage
-----

To list all data sets contained in this package:

``` {.r}
data(package = "qss")
data(elections, package = "qss") # load the elections data
vignette(package = "qss") # list all vignettes
browseVignettes("qss") # list vignettes and R code
vignette("causality", package = "qss") # show the vignette for the Causality chapter
```

The Federalist papers text files are in the `extdata/federalist` directory of the installed package and need to be accessed as follows:

``` {.r}
library("tm")
federalist_dir <- system.file("extdata", "federalist", package = "qss")
dir(federalist_dir)
corpus.raw <- Corpus(DirSource(federalist_dir))
corpus.raw
```

In 1.3.5 "Data Files", several types of data files are discussed. These are included in `extdata/`:

``` {.r}
library("foreign")
dir(system.file("extdata", "data_files", package = "qss"))
load(system.file("extdata", "data_files", "UNpop.RData", package = "qss"))
read.csv(system.file("extdata", "data_files", "UNpop.csv", package = "qss"))
read.dta(system.file("extdata", "data_files", "UNpop.dta", package = "qss"))
```

Build Package and Documentation
===============================

To rebuild `README.md` from `README.Rmd`:

``` {.r}
rmarkdown::render("README.Rmd")
```

The [site](https://kosukeimai.github.io/qss-package) for the package is built using [pkgdown](https://github.com/hadley/pkgdown):

``` {.r}
# devtools::install_github("hadley/pkgdown")
pkgdown::build_site()
```

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