Base R Cheat Sheet

Base R is a programming language that is widely used for statistical computing and graphics. It is a free and open-source software that provides a wide range of tools for data analysis, manipulation, and visualization. Base R is a powerful tool for data scientists, statisticians, and researchers who need to analyze large datasets and generate high-quality graphics.

One of the key features of Base R is its ability to handle data in various formats, including CSV, Excel, and SQL databases. It also provides a wide range of functions for data manipulation, such as filtering, sorting, merging, and reshaping. Base R also includes powerful statistical functions for hypothesis testing, regression analysis, and time series analysis.

This cheat sheet will get you started! Enjoy!

Data Structures

Data Structure	Description
Vector	A collection of elements of the same data type
Matrix	A collection of elements arranged in a two-dimensional rectangular layout
Array	A collection of elements arranged in a multi-dimensional rectangular layout
List	A collection of elements of different data types
Data Frame	A collection of elements arranged in a two-dimensional rectangular layout, where each column can have a different data type

Data Types

Data Type	Description
Numeric	Numbers with decimal points
Integer	Whole numbers
Logical	TRUE or FALSE
Character	Text
Factor	Categorical data

Basic Operations

Operation	Description
Assignment	Assigns a value to a variable
Arithmetic	Performs mathematical operations
Comparison	Compares two values and returns a logical value
Logical	Combines logical values using AND, OR, and NOT
Subset	Extracts a subset of a data structure
Merge	Combines two data frames based on a common column

Control Structures

Control Structure	Description
if-else	Executes a block of code if a condition is TRUE, and another block of code if it is FALSE
for	Executes a block of code a fixed number of times
while	Executes a block of code as long as a condition is TRUE
repeat	Executes a block of code indefinitely until a break statement is encountered
switch	Executes a block of code based on the value of an expression

Functions

Function	Description
mean	Calculates the mean of a vector
sd	Calculates the standard deviation of a vector
var	Calculates the variance of a vector
sum	Calculates the sum of a vector
length	Calculates the length of a vector
strsplit	Splits a character string into substrings based on a delimiter

Input/Output

Function	Description
read.csv	Reads a CSV file into a data frame
write.csv	Writes a data frame to a CSV file
read.table	Reads a tabular file into a data frame
write.table	Writes a data frame to a tabular file
readLines	Reads lines from a text file into a character vector
writeLines	Writes lines from a character vector to a text file

References

Base R Documentation