BiocGenerics (version 0.18.0)

row+colnames: Row and column names


Get or set the row or column names of a matrix-like object.

NOTE: This man page is for the rownames, `rownames<-`, colnames, and `colnames<-` S4 generic functions defined in the BiocGenerics package. See ?base::rownames for the default methods (defined in the base package). Bioconductor packages can define specific methods for objects (typically matrix-like) not supported by the default methods.


rownames(x, do.NULL=TRUE, prefix="row") rownames(x) <- value
colnames(x, do.NULL=TRUE, prefix="col") colnames(x) <- value


A matrix-like object.
do.NULL, prefix
See ?base::rownames for a description of these arguments.
Either NULL or a character vector equal of length equal to the appropriate dimension.


The getters will return NULL or a character vector of length nrow(x) for rownames and length ncol(x) for colnames(x).See ?base::rownames for more information about the default methods, including how the setters are expected to behave.Specific methods defined in Bioconductor packages should behave as consistently as possible with the default methods.

See Also

  • base::rownames for the default rownames, `rownames<-`, colnames, and `colnames<-` methods.

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

  • selectMethod for getting the definition of a specific method.

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

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


Run this code
## rownames getter:
rownames  # note the dispatch on the 'x' arg only
selectMethod("rownames", "ANY")  # the default method

## rownames setter:
selectMethod("rownames<-", "ANY")  # the default method

## colnames getter:
colnames  # note the dispatch on the 'x' arg only
selectMethod("colnames", "ANY")  # the default method

## colnames setter:
selectMethod("colnames<-", "ANY")  # the default method

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