## -------------------------------------------------------------
a <- 2
b <- 1:10


## -------------------------------------------------------------
ls()


## -------------------------------------------------------------
rm(a)


## -------------------------------------------------------------
rm(list=ls())


## -------------------------------------------------------------
save.image(file="myobjects.RData")


## -------------------------------------------------------------
load("myobjects.RData")


## -------------------------------------------------------------
getwd()


## ----eval=F---------------------------------------------------
## install.packages("ggplot2")


## ----eval=F---------------------------------------------------
## library(ggplot2)


## -------------------------------------------------------------
vignette(package = "ggplot2")


## ----eval=F---------------------------------------------------
## vignette("extending-ggplot2", package = "ggplot2")


## ----eval=F---------------------------------------------------
## help("read.table")
## # o
## ?read.table


## ----eval = F-------------------------------------------------
## help.start()


## -------------------------------------------------------------
1+2+3
2+3*4
2+(3*4)
(2 + 3) * 4
3/2+1
4*3^3


## -------------------------------------------------------------
2 > 10
2 <= 10
5!=5


## -------------------------------------------------------------
"Hello"


## ----eval = FALSE---------------------------------------------
## ## Note: Generic code
## [name of object] <- [thing I want to save]


## -------------------------------------------------------------
x <- sqrt(2)


## -------------------------------------------------------------
x # Print the object x


## -------------------------------------------------------------
x^3 -> y
y
z <- log(y)+x
z
word <- "Hello"
n <- nchar(word)


## ----include = F----------------------------------------------
log(9, base = 3)
119%%13 ; 119%/%13
(7 + 3 - 5 * 2) == ((7 + 3) - (5 * 2))
574%/%7 * 7 == 574
x <- 5.0359
ceiling(x)
floor(x)
round(x, 2)