Sample Knitr document

knitr-example.Rmd

---
title: "Sample Knitr Document"
author: "Lincoln Mullen"
date: "September 24, 2014"
output: html_document
---

This is an example of how to use Knitr for doing historical data analysis and writing.

Text that is outside the code block is just ordinary text. You can use it to explain what you're doing or to write an article.

But text that goes inside a code block is run by R. For example, here we load the [historydata package](https://github.com/lmullen/historydata) and display one of the datasets.

```{r}
library(historydata)
library(dplyr)
us_state_populations
```

Now I can create a plot inside another code block:

```{r}
library(ggplot2)
ggplot(data = us_state_populations,
       aes(x = year, y = population)) + 
  geom_point()
```

This would be a good place to explain what that plot means.

Now I can click the "Knit HTML" button in RStudio and get a document with the plot embedded. Then I can click the "Publish" button to get a document to share.