---
title: "Practical R: [Introductions](#about)"
author: Abhijit Dasgupta
date: BIOF 339

---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE, comment = '#> ')
knitr::opts_chunk$set( warning=F, message = F, fig.retina=3)
library(tidyverse)
library(lubridate)
library(knitr)
library(pander)
library(fontawesome)
library(emo)
library(countdown)
```

layout: true

<div class="my-header">
<span>BIOF339</span></div>
</div>

---

# Is there a difference in ozone between months

.pull-left[
```{r 01-intro-20, echo=T}
summary(aov(Ozone ~ Month, data=airquality))
```

Whoops!! Only 1 df but 5 months!! 

This is doing ANCOVA/Regression
]

--

.pull-right[
```{r 01-intro-21, echo=T}
summary(aov(Ozone~factor(Month), data=airquality))
```

`factor` can convert a numerical or character variable into a categorical variable
]

--

> I'm doing a lot of things on the fly here. We'll work through these at a saner pace in the coming weeks. Don't panic!! Breathe!!!