sample_n
{dplyr}
Sample a number of observations from a data frame
ifelse
{base}
Return a or b depending on the value of test
order
{base}
Get indexes that will sort a vector
desc
{dplyr}
Arrange in descending order
stargazer
{stargazer}
Create a regression output table
install.packages
{base}
Install R package
subset
{base}
Return subsets of vectors, matrices or data frames which meet conditions.
geom_smooth
{GGPLOT2}
Generates a smoothed conditional means curve / line
get_mode
{rstatix}
Compute the mode in a given vector.
ggplot
{GGPLOT2}
Create a ggplot graph
coord_flip
{GGPLOT2}
Flip the x and y axes of a graph
geom_hline
{GGPLOT2}
Add a horizontal line in GGPLOT2
expression
{base}
Used in plots to add symbols to axes
as.numeric
{base}
Coerce a vector to numeric
after_stat
{GGPLOT2}
Control aesthetic evaluation. On the module used for displying percent
arrow
{GGPLOT2}
Draw an arrow in a ggplot graph
rnorm
{base}
Generate random numbers from a normal distribution
grid.arrange
{gridExtra}
Places graphical objects into a rectangular grid
chisq.test
{stats}
Chi-Squared test (e.g. for cross-tabulations)
t.test
{stats}
Performs one and two sample t-tests on vectors of data.
pie
{graphics}
Creates a basic pie chart
cor.test
{stats}
Test for Association/Correlation Between Paired Samples
labs
{GGPLOT2}
Customise labels in GGPLOT2
reorder
{stats}
Reorder Levels of Factor based on the values of a second variable, usually numeric.
plot
{graphics}
Generic function from base R to produce a plot
cut
{base}
Convert Numeric to Factor
freq
{questionr}
Generate frequency tables
xlab
{GGPLOT2}
Label the x axis (ggplot)
prop.table
{base}
Transform frequency table into table of proportions
addmargins
{stats}
Puts Arbitrary Margins on Multidimensional Tables or Arrays
matrix
{base}
Creates a matrix from the given set of values.
barplot
{graphics}
Plot a simple bar plot
range
{base}
Return range of values
with
{base}
evaluate expression in the context of a data frame
quantile
{stats}
Obtain empirical quantiles of a vector
geom_ribbon
{GGPLOT2}
Generates an area plot
geom_bar
{GGPLOT2}
Generates a bar chart
max
{base}
Get maximum of a vector
mutate
{dplyr}
Modify/create a column in a data frame
c
{base}
Combine values/vectors into a vector
predict
{stats}
Predict Probability
seq
{base}
Create a sequence
geom_vline
{GGPLOT2}
Draws a vertical line
ungroup
{dplyr}
Resolve grouping created with “group_by”
sd
{stats}
Get standard deviation of a vector
read_dta
{haven}
Read a .dta file (Stata data)
mean
{base}
Get mean of a vector
str
{utils}
Get the structure of an R object
theme_classic
{GGPLOT2}
A minimalistic theme with no gridlines
attach
{base}
Attach Set of R Objects to Search Path
confint
{stats}
Calculate confidence Intervals for Model Parameters
library
{base}
Load an R package
theme_bw
{GGPLOT2}
A black and white ggplot theme
theme
{GGPLOT2}
Set theme for GGPLOT2
as.factor
{base}
Coerce a vector to factor
is.na
{base}
Check if a value is NA/elements of vector are NA
sample
{base}
Takes a sample of the specified size
sum
{base}
Get sum of numeric values or a vector
cbind
{base}
Combine R objects by columns
levels
{base}
Get levels of a factor
geom_point
{GGPLOT2}
Generates a scatter plot
read.spss
{foreign}
Read a .sav file (SPSS data)
cor
{stats}
Calculate Correlation Matrix
prop.test
{stats}
Test of Equal or Given Proportions
tapply
{base}
Create statistical summaries by group based on the levels of one or several factors
min
{base}
Get minimum of a vector
geom_segment
{GGPLOT2}
Generates a line segment or curve
summary
{base}
Obtain summary statistics or detailed regression output
recode
{dplyr}
Recode a variable
colnames
{base}
Retrieve column names of a data frame
print
{base}
Print object to the console
ggtitle
{GGPLOT2}
Generates a title for a ggplot graph
scale_y_continuous
{GGPLOT2}
Customise continuous y axis
setwd
{base}
Set Working Directory
dnorm
{stats}
Density distribution for the normal distribution
median
{stats}
Get median of a vector
ncol
{base}
Get number of columns of a data frame
filter
{dplyr}
Filter out rows of a data frame according to logical vector
group_by
{dplyr}
Group tibble/data.frame by a factor variable. All further tidyverse operations are performed group-wise
boxplot
{graphics}
Plot a simple box plot
which.max
{base}
return index of the largest value in a vector
rbeta
{stats}
Beta Random Number Generating Function
ylab
{GGPLOT2}
Label the y axis (ggplot)
par
{graphics}
Set parameters of the plotting device
ordered
{dplyr}
Create an ordered factor
head
{utils}
Show first 5 rows of a data frame
summarise
{dplyr}
collapse the dataset to a summary statistic. Usually used with group_by()
rm
{base}
Remove objects
ls
{base}
Return a vector of character strings giving the names of the objects in the specified environment
tabulate
{base}
Counts the number of times each integer occurs in an integer-only vector
geom_density
{GGPLOT2}
Generates a density plot
aes
{GGPLOT2}
Construct aesthetic mapping of a ggplot graph
bar
{base}
Used for annotations, such as “expression(paste(”-“,bar(y)))”
set.seed
{base}
Initialise a pseudorandom number generator.
scale_x_continuous
{GGPLOT2}
Customise continuous x axis
round
{base}
Rounds numbers
var
{stats}
Calculate variance
lprop
{questionr}
Display row percentages of a two-way frequency table
names
{base}
Retrieve names of a list/vector
read.csv
{utils}
Read a csv file to data frame. Specify stringsAsFactors = FALSE to keep all string columns as characters
nrow
{base}
Get number of rows of a data frame
View
{base}
View a data frame
complete.cases
{stats}
Find Complete Cases
plotPlane
{rockchalk}
Draw a 3-D regression plot for two predictors
select
{dplyr}
Select columns from a tibble/data frame
scale_colour_manual
{GGPLOT2}
Create your own discrete scale
which
{base}
return indexes of TRUE entries of a logical vector
unique
{base}
get unique elements
geom_histogram
{GGPLOT2}
Generates a histogram
slice
{dplyr}
Subset rows using their positions
factor
{base}
Create a factor
runif
{stats}
Draws ranndom numbers from the uniform distribution
element_blank
{GGPLOT2}
This theme element draws nothing, and assigns no space
dim
{base}
Get dimensions of a data frame
data.frame
{base}
Create a data.frame from vectors
as.data.frame
{base}
Functions to check if an object is a data frame, or coerce it if possible.
ls.str
{utils}
Similarly to ls, with a print() method that calls str() on each object
class
{base}
Retrieve class of an R object
table
{base}
Obtain frequency table of a variable/cross-tabulation of two variables
hist
{graphics}
Plot a simple histogram
read_excel
{readxl}
Read an Excel file
element_text
{GGPLOT2}
Customise text in GGPLOT2
rbind
{base}
Combine R objects by rows
lm
{base}
Fit a linear model
arrange
{dplyr}
Sort values of data frame according to a variable/combination of varaibles
The end!