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#----- Lab 0 -----#
###################


# You can use R as a calculator
1+2
(1+2*(3-4)) / 2 # parentheses are highlighted

# Nothing is saved
ls()

# But if we assign it to an object
x <- (1+2) / 3

# Now, x is saved
ls()

# Delete it
rm(x)

# Now x is not recognized
x

# Assign a value to x, y, z
x <- 1
y <- 2
z <- 3

# Perform calculations with objects
x + y

# R recognizes capital letters!
x
X

# See what your working directory is
getwd()

# Set it to whatever you want, e.g. your Desktop (replace '...' in the code below)
setwd("C:/.../Desktop")

# Save your history for later use (with name "history_name")
savehistory("C:/.../history_name.R")

# Load it again if you want
loadhistory("C:/.../history_name.R")

# Delete every saved object
rm(list = ls())

# Get help with a function (3 ways)
?mean # short for help(mean)
??mean # short for help.search("mean"): searches the help pages of all installed packages
apropos("mean") # searches in the loaded packages (can be shown via search())

# Create your first plot (a Normal(0,1) of course!)
xx <- seq(-4, 4, length.out = 1000)
plot(xx, dnorm(xx, 0, 1), type = "l")
plot(1:10, 1:10)

dev.new()
plot(1:5, 1:5)
dev.off()

# Quit RStudio
q()