--- title: "Data Subsetting, Part 2 - Lab" output: html_document editor_options: chunk_output_type: console --- ```{r setup, include=FALSE} knitr::opts_chunk$set(echo = TRUE) ``` In this lab you can use the interactive console to explore but please record your commands here. Remember anything you type here can be "sent" to the console with Cmd-Enter (OS-X) or Cntr-Enter (Windows/Linux) (But only in side the ```{r}``` areas). ```{r, message = FALSE} library(dplyr) library(tidyverse) ``` 1. In the data set `mpg`, rename the column `year` to `YEAR` using `rename`. ```{r} ``` 2. Convert the column names of `mpg` to all upper case. Use `rename_with`, and the `toupper` command (or `colnames`). Save the output to `Upper_mpg`. ```{r} ``` 3. Re-order the rows of `mpg` by `cyl` in increasing order. Use `arrange()`. Reassign the `mpg` data! ```{r} ``` 4. Create a new variable in `mpg` called `cty2`, which is equal to `cty^2`, using `mutate()`. ```{r} ``` 5. Update the variable in `mpg` called `displ` to be 10 times the current value using `mutate()`. ```{r} ```