Lecture handout:

chp2-handout.pdf

Lecture slides (w/ answers):

chp2.pdf

Textbook:

Chapter 2, Summarizing Data

R skills:

• assignment {r eval=FALSE} <-, =, <<-

  • use <- for assignment,= for keyword arguments, and <<- is used for assignment outside of the current environment, e.g. in function definitions

  • = can be used for assignment but it’s best to use <-

• environments

environment() 
# vs environment(rnorm)
search()
library(openintro) # cars  vs datasets::cars
list.files() 
getwd() 
setwd()

• rmarkdown https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet