This is a document that I will grow as the semester progresses it includes all operators and functions that we have used and that you are responsible for being able to use in your work
+ adds two values together
** exponentiation
^ exponentiation
/ division
%% modulo division
<- assigns a value to a variable
: provides a range of numbers
[] access part of a vector, dataframe, or matrix
[[]] access part of a list
() provide arguments to a function
== test for equality
!= test for inequality
>, <, <=,
>= etc.
%in% is the item on the left present in the item on the
right
c concatenates things into a vector
matrix creates a matrix
cbind combine vectors as columns of a matrix
rbind combine vectors as the rows of a matrix
rep replicate something
data.frame create a dataframe
for perform a block of code more than once
if perform a block of code under some conditions
while perform a block of code as long as a condition is
true
rnorm provide samples from a normal distribution
rpois provide samples from a poisson distribution
rexp provide samples from an exponential
distribution
runif provide samples from a uniform distribution
rbinom provide samples from a binomial distribution
seq provide a sequence of values
plot basic plotting function to start off with
barplot basic bar plot
boxplot basic box plot
hist basic histogram
points adds points to an existing plot
text adds text to an existing plot
read.csv read a csv file
write.csv write a csv file
print print to the console
sum sums a vectors of numbers together