Check existence and access rights of files
Check if an object contains missing values
Check for existence and access rights of directories
Check if an argument is a matrix
Check if an argument is named
Check if an argument is a data frame
Check if object is a subset of a given set
Check that an argument is an atomic vector
Check if an argument is an environment
Check if an argument is vector of type integer
Check if an argument is a vector of type logical
Collect multiple assertions
The checkmate package
Check if an argument is a flag
Convert an argument to an integer
Check that an argument is a vector of type numeric
Check if an argument is a function
Check if an argument is a vector
Check if an argument is a count
Check if an argument is a list
Check if an argument is a percentage
Check if an argument is a single numeric
Check file path for later output
Check if an object is an element of a given set
Check argument inheritance
Coalesce operator
Check if an argument is a factor
Check if an argument is a single missing value
Check if an argument is a single atomic value
Combine multiple checks into one assertion
Check file system access rights
Check if object is a subset of a given set
Check if an argument is a single integerish value
Check if an argument is a vector of type complex
Check if an object contains NaN values
Check names to comply to specific rules
Quick recursive arguments checks on lists and data frames
Check if an argument is a string
Check if an object is an integerish vector
Check if an object contains infinte values
Check that an argument is an atomic vector
Check if an argument is a vector of type character
Check if an argument is an array
Quick argument checks on (builtin) R types
Check if an argument is NULL