duplicated: Determine duplicate elements

In Bioconductor/BiocGenerics: S4 generic functions used in Bioconductor

Determine duplicate elements

Description

Determines which elements of a vector-like or data-frame-like object are duplicates of elements with smaller subscripts, and returns a logical vector indicating which elements (rows) are duplicates.

NOTE: This man page is for the duplicated and anyDuplicated S4 generic functions defined in the BiocGenerics package. See ?base::duplicated for the default methods (defined in the base package). Bioconductor packages can define specific methods for objects (typically vector-like or data-frame-like) not supported by the default method.

Usage

duplicated(x, incomparables=FALSE, ...)
anyDuplicated(x, incomparables=FALSE, ...)

Arguments

x	A vector-like or data-frame-like object.
incomparables, ...	See ?base::duplicated for a description of these arguments.

Value

The default duplicated method (see ?base::duplicated) returns a logical vector of length N where N is:

• length(x) when x is a vector;

• nrow(x) when x is a data frame.

Specific duplicated methods defined in Bioconductor packages must also return a logical vector of the same length as x when x is a vector-like object, and a logical vector with one element for each row when x is a data-frame-like object.

The default anyDuplicated method (see ?base::duplicated) returns a single non-negative integer and so must the specific anyDuplicated methods defined in Bioconductor packages.

anyDuplicated should always behave consistently with duplicated.

See Also

• base::duplicated for the default duplicated and anyDuplicated methods.

• showMethods for displaying a summary of the methods defined for a given generic function.

• selectMethod for getting the definition of a specific method.

• duplicated,Rle-method in the S4Vectors package for an example of a specific duplicated method (defined for Rle objects).

• BiocGenerics for a summary of all the generics defined in the BiocGenerics package.

Examples

duplicated
showMethods("duplicated")
selectMethod("duplicated", "ANY")  # the default method

anyDuplicated
showMethods("anyDuplicated")
selectMethod("anyDuplicated", "ANY")  # the default method

Bioconductor/BiocGenerics documentation built on Nov. 17, 2024, 6:52 p.m.