dnorm
{stats}
Density distribution for the normal distribution
levels
{base}
Get levels of a factor
as.numeric
{base}
Coerce a vector to numeric
colnames
{base}
Retrieve column names of a data frame
plot
{graphics}
Generic function from base R to produce a plot
table
{base}
Obtain frequency table of a variable/cross-tabulation of two variables
range
{base}
Return range of values
summarise
{dplyr}
collapse the dataset to a summary statistic. Usually used with group_by()
ungroup
{dplyr}
Resolve grouping created with “group_by”
t.test
{stats}
Performs one and two sample t-tests on vectors of data.
setwd
{base}
Set Working Directory
prop.test
{stats}
Test of Equal or Given Proportions
labs
{GGPLOT2}
Customise labels in GGPLOT2
scale_y_continuous
{GGPLOT2}
Customise continuous y axis
geom_segment
{GGPLOT2}
Generates a line segment or curve
library
{base}
Load an R package
group_by
{dplyr}
Group tibble/data.frame by a factor variable. All further tidyverse operations are performed group-wise
save
{base}
Writes an external representation of R objects to the specified file.
as.character
{base}
Coerce a vector to character
rnorm
{base}
Generate random numbers from a normal distribution
theme_classic
{GGPLOT2}
A minimalistic theme with no gridlines
n
{dplyr}
The number of observations in the current group.
stat_ecdf
{GGPLOT2}
Compute empirical cumulative distribution
spread
{tidyr}
Spread a key-value pair across multiple columns
element_text
{GGPLOT2}
Customise text in GGPLOT2
ls
{base}
Return a vector of character strings giving the names of the objects in the specified environment
geom_density
{GGPLOT2}
Generates a density plot
summary
{base}
Obtain summary statistics or detailed regression output
separate
{dplyr}
Separate a character column into multiple columns
var
{stats}
Calculate variance
seq
{base}
Create a sequence
select
{dplyr}
Select columns from a tibble/data frame
sum
{base}
Get sum of numeric values or a vector
View
{base}
View a data frame
desc
{dplyr}
Arrange in descending order
read_dta
{haven}
Read a .dta file (Stata data)
read_excel
{readxl}
Read an Excel file
factor
{base}
Create a factor
recode
{dplyr}
Recode a variable
max
{base}
Get maximum of a vector
element_line
{GGPLOT2}
Customise line appearance
ifelse
{base}
Return a or b depending on the value of test
names
{base}
Retrieve names of a list/vector
sqrt
{stats}
Square root
geom_hline
{GGPLOT2}
Add a horizontal line in GGPLOT2
complete.cases
{stats}
Find Complete Cases
element_blank
{GGPLOT2}
This theme element draws nothing, and assigns no space
quantile
{stats}
Obtain empirical quantiles of a vector
length
{base}
Returns number of elements in an object
set.seed
{base}
Initialise a pseudorandom number generator.
subset
{base}
Return subsets of vectors, matrices or data frames which meet conditions.
sd
{stats}
Get standard deviation of a vector
filter
{dplyr}
Filter out rows of a data frame according to logical vector
head
{utils}
Show first 5 rows of a data frame
expression
{base}
Used in plots to add symbols to axes
min
{base}
Get minimum of a vector
geom_ribbon
{GGPLOT2}
Generates an area plot
geom_histogram
{GGPLOT2}
Generates a histogram
hist
{graphics}
Plot a simple histogram
ordered
{dplyr}
Create an ordered factor
which.max
{base}
return index of the largest value in a vector
read.csv
{utils}
Read a csv file to data frame. Specify stringsAsFactors = FALSE to keep all string columns as characters
str
{utils}
Get the structure of an R object
arrange
{dplyr}
Sort values of data frame according to a variable/combination of varaibles
write.csv
{utils}
write a csv file to a data frame
median
{stats}
Get median of a vector
with
{base}
evaluate expression in the context of a data frame
cut
{base}
Convert Numeric to Factor
scale_x_continuous
{GGPLOT2}
Customise continuous x axis
boxplot
{graphics}
Plot a simple box plot
is.na
{base}
Check if a value is NA/elements of vector are NA
mean
{base}
Get mean of a vector
nrow
{base}
Get number of rows of a data frame
tibble
{tibble}
A modern data frame from the tidyverse
aes
{GGPLOT2}
Construct aesthetic mapping of a ggplot graph
geom_line
{GGPLOT2}
Generates a line
rm
{base}
Remove objects
data.frame
{base}
Create a data.frame from vectors
par
{graphics}
Set parameters of the plotting device
mutate
{dplyr}
Modify/create a column in a data frame
slice
{dplyr}
Subset rows using their positions
ggsave
{ggplot2}
Saves the last ggplot or a specified ggplot object to a file
c
{base}
Combine values/vectors into a vector
ggplot
{GGPLOT2}
Create a ggplot graph
print
{base}
Print object to the console
theme
{GGPLOT2}
Set theme for GGPLOT2
install.packages
{base}
Install R package
The end!