head
{utils}
Show first 5 rows of a data frame
as.character
{base}
Coerce a vector to character
summarise
{dplyr}
collapse the dataset to a summary statistic. Usually used with group_by()
element_text
{GGPLOT2}
Customise text in GGPLOT2
data.frame
{base}
Create a data.frame from vectors
scale_x_continuous
{GGPLOT2}
Customise continuous x axis
mutate
{dplyr}
Modify/create a column in a data frame
theme_classic
{GGPLOT2}
A minimalistic theme with no gridlines
c
{base}
Combine values/vectors into a vector
factor
{base}
Create a factor
sum
{base}
Get sum of numeric values or a vector
select
{dplyr}
Select columns from a tibble/data frame
filter
{dplyr}
Filter out rows of a data frame according to logical vector
hist
{graphics}
Plot a simple histogram
mean
{base}
Get mean of a vector
complete.cases
{stats}
Find Complete Cases
ylab
{GGPLOT2}
Label the y axis (ggplot)
ordered
{dplyr}
Create an ordered factor
min
{base}
Get minimum of a vector
labs
{GGPLOT2}
Customise labels in GGPLOT2
read_dta
{haven}
Read a .dta file (Stata data)
n
{dplyr}
The number of observations in the current group.
read.csv
{utils}
Read a csv file to data frame. Specify stringsAsFactors = FALSE to keep all string columns as characters
ggplot
{GGPLOT2}
Create a ggplot graph
geom_histogram
{GGPLOT2}
Generates a histogram
max
{base}
Get maximum of a vector
stat_ecdf
{GGPLOT2}
Compute empirical cumulative distribution
write_dta
NA
sample_n
{dplyr}
Sample a number of observations from a data frame
theme
{GGPLOT2}
Set theme for GGPLOT2
save
{base}
Writes an external representation of R objects to the specified file.
str
{utils}
Get the structure of an R object
geom_segment
{GGPLOT2}
Generates a line segment or curve
recode
{dplyr}
Recode a variable
aes
{GGPLOT2}
Construct aesthetic mapping of a ggplot graph
as.numeric
{base}
Coerce a vector to numeric
ungroup
{dplyr}
Resolve grouping created with “group_by”
ecdf
{stats}
Compute an empirical cumulative distribution function
spread
{tidyr}
Spread a key-value pair across multiple columns
sqrt
{stats}
Square root
median
{stats}
Get median of a vector
summarize
NA
set.seed
{base}
Initialise a pseudorandom number generator.
read_excel
{readxl}
Read an Excel file
slice
{dplyr}
Subset rows using their positions
desc
{dplyr}
Arrange in descending order
write.csv
{utils}
write a csv file to a data frame
geom_bar
{GGPLOT2}
Generates a bar chart
levels
{base}
Get levels of a factor
scale_y_continuous
{GGPLOT2}
Customise continuous y axis
library
{base}
Load an R package
setwd
{base}
Set Working Directory
prop.test
{stats}
Test of Equal or Given Proportions
summary
{base}
Obtain summary statistics or detailed regression output
group_by
{dplyr}
Group tibble/data.frame by a factor variable. All further tidyverse operations are performed group-wise
with
{base}
evaluate expression in the context of a data frame
arrange
{dplyr}
Sort values of data frame according to a variable/combination of varaibles
is.na
{base}
Check if a value is NA/elements of vector are NA
boxplot
{graphics}
Plot a simple box plot
t.test
{stats}
Performs one and two sample t-tests on vectors of data.
cut
{base}
Convert Numeric to Factor
separate
{dplyr}
Separate a character column into multiple columns
sd
{stats}
Get standard deviation of a vector
range
{base}
Return range of values
table
{base}
Obtain frequency table of a variable/cross-tabulation of two variables
var
{stats}
Calculate variance
seq
{base}
Create a sequence
names
{base}
Retrieve names of a list/vector
ifelse
{base}
Return a or b depending on the value of test
The end!