tapply {BiocGenerics}R Documentation

Apply a function over a ragged array

Description

tapply applies a function to each cell of a ragged array, that is to each (non-empty) group of values given by a unique combination of the levels of certain factors.

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

Usage

tapply(X, INDEX, FUN=NULL, ..., simplify=TRUE)

Arguments

X

A list-like or vector-like R object.

INDEX, FUN, ..., simplify

See ?base::tapply for a description of these arguments.

Value

See ?base::tapply for the value returned by the default method.

Specific methods defined in other Bioconductor packages should behave as consistently as possible with the default method.

See Also

base::tapply for the default tapply method.

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

selectMethod for getting the definition of a specific method.

tapply,Vector-method in the IRanges package for the tapply method defined for Vector objects.

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

Examples

tapply  # note the dispatch on the 'X' arg only
showMethods("tapply")
selectMethod("tapply", "ANY")  # the default method

[Package BiocGenerics version 0.2.0 Index]