---
title: "Lab 2"
author: "Your Name Here"
output: html_document
---

```{r}
library(tidyverse)
```

#### 1. Changing the author field and file name.

##### (a) Change the `author:` field on the Rmd document from Your Name Here to your own name.

##### (b) Rename this file to "lab02_YourHameHere.Rmd", where YourNameHere is changed to your own name.

#### 2. Data practice

In class we imported the survey data using the `read.table()` function.  (Note: on Homework 1 you'll be asked to use the `read.csv()` function instead.)

This is the code we used:

```{r}
survey <- read.table("http://www.andrew.cmu.edu/user/achoulde/94842/data/survey_data2020.csv", header=TRUE, sep=",") 
```

##### (a) How many survey respondents are from MISM or Other?

```{r}
# Edit me
```

##### (b) What % of survey respondents are from PPM?

```{r}
# Edit me
```

#### 3. Index practice

##### (a) Use $ notation to pull the OperatingSystem column from the survey data

```{r}
# Edit me
```

##### (b) Do the same thing with [,] notation, referring to OperatingSystem by name

```{r}
# Edit me
```

##### (c) Repeat part (b), this time referring to OperatingSystem by column number

```{r}
# Edit me
```

##### (d) Repeat part (b), this time using the `select()` function.

```{r}
# Edit me
```

##### (e) Use `filter()` and `select()` together to get the `Program` and `Rexperience` of every student who watched at least 10 hours of TV last week.

```{r}
# Edit me
```

#### 4. Optional practice

Try re-running as much of the lecture code as you have time for, taking time to understand what is happening in each line of code.  

**Tip:** Instead of copying and pasting code, practice typing it yourself.  This will help you to learn the syntax.

```{r}
# Edit me (optional)
```
