summarize
{dplyr}
Collapse the dataset to a summary statistic (American-spelling alias of summarise)
aggregate
{stats}
Compute summary statistics of data subsets / by groups
hist
{graphics}
Plot a simple histogram
desc
{dplyr}
Arrange in descending order
head
{utils}
Show first 5 rows of a data frame
spread
{tidyr}
Spread a key-value pair across multiple columns
separate
{tidyr}
Split columns
ggplot
{GGPLOT2}
Create a ggplot graph
table
{base}
Obtain frequency table of a variable/cross-tabulation of two variables
geom_histogram
{GGPLOT2}
Generates a histogram
setwd
{base}
Set Working Directory
sd
{stats}
Get standard deviation of a vector
plot
{graphics}
Generic function from base R to produce a plot
is.na
{base}
Check if a value is NA/elements of vector are NA
aes
{GGPLOT2}
Construct aesthetic mapping of a ggplot graph
boxplot
{graphics}
Plot a simple box plot
select
{dplyr}
Select columns from a tibble/data frame
print
{base}
Print object to the console
var
{stats}
Calculate variance
recode_factor
{dplyr}
Recode factor values, changing the levels and their order
subset
{base}
Return subsets of vectors, matrices or data frames which meet conditions.
which.max
{base}
return index of the largest value in a vector
as.numeric
{base}
Coerce a vector to numeric
group_by
{dplyr}
Group tibble/data.frame by a factor variable. All further tidyverse operations are performed group-wise
mutate
{dplyr}
Create new variables
install_rsthemes
{rsthemes}
Install the rsthemes collection of RStudio themes
str
{utils}
Get the structure of an R object
summarise
{dplyr}
collapse the dataset to a summary statistic. Usually used with group_by()
write.csv
{utils}
write a csv file to a data frame
labs
{GGPLOT2}
Customise labels in GGPLOT2
max
{base}
Get maximum of a vector
filter
{dplyr}
Filter out rows of a data frame according to logical vector
write_dta
{haven}
Write Stata files
as.character
{base}
Coerce a vector to character
read.csv
{utils}
Read a csv file to data frame. Specify stringsAsFactors = FALSE to keep all string columns as characters
read_excel
{readxl}
Read an Excel file
factor
{base}
Create a factor
View
{base}
View a data frame
slice
{dplyr}
Select rows by position
min
{base}
Get minimum of a vector
median
{stats}
Get median of a vector
arrange
{dplyr}
Sort values of data frame according to a variable/combination of variables
cut
{base}
Convert Numeric to Factor
ordered
{dplyr}
Create an ordered factor
summary
{base}
Obtain summary statistics or detailed regression output
levels
{base}
Get levels of a factor
order
{base}
Get indexes that will sort a vector
ifelse
{base}
Return a or b depending on the value of test
theme_classic
{GGPLOT2}
A minimalistic theme with no gridlines
ls
{base}
Return a vector of character strings giving the names of the objects in the specified environment
recode
{dplyr}
Recode a variable
read_dta
{haven}
Read a .dta file (Stata data)
seq
{base}
Create a sequence
data.frame
{base}
Create a data.frame from vectors
length
{base}
Returns number of elements in an object
rm
{base}
Remove objects
n
{dplyr}
The number of observations in the current group.
sum
{base}
Get sum of numeric values or a vector
save
{base}
Save R objects
quantile
{stats}
Obtain empirical quantiles of a vector
names
{base}
Get or set names of an object
c
{base}
Combine values/vectors into a vector
range
{base}
Return range of values
mean
{base}
Get mean of a vector
factor
{base}
Create factor variables
which.min
{base}
Return the index of the smallest value in a vector
install.packages
{utils}
Install R packages
ungroup
{dplyr}
Resolve grouping created with “group_by”
library
{base}
Load an R package
with
{base}
evaluate expression in the context of a data frame
nrow
{base}
Get number of rows of a data frame
scale_x_continuous
{GGPLOT2}
Customise continuous x axis
The end!