Determine duplicate elements
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.
duplicated(x, incomparables=FALSE, ...) anyDuplicated(x, incomparables=FALSE, ...)
x |
A vector-like or data-frame-like object. |
incomparables, ... |
See |
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.
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.
duplicated
showMethods("duplicated")
selectMethod("duplicated", "ANY") # the default method
anyDuplicated
showMethods("anyDuplicated")
selectMethod("anyDuplicated", "ANY") # the default methodPlease choose more modern alternatives, such as Google Chrome or Mozilla Firefox.