The number of rows/columns of an array-like object

Return the number of rows or columns present in an array-like object.

NOTE: This man page is for the nrow, ncol, NROW and NCOL S4 generic functions defined in the BiocGenerics package. See ?base::nrow for the default methods (defined in the base package). Bioconductor packages can define specific methods for objects (typically matrix- or array-like) not supported by the default methods.

Keywords
methods
Usage
nrow(x) ncol(x) NROW(x) NCOL(x)
Arguments
x
A matrix- or array-like object.
Value

A single integer or NULL.Specific methods defined in Bioconductor packages should behave as consistently as possible with the default methods.

See Also

  • base::nrow for the default nrow, ncol, NROW and NCOL methods.

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

  • selectMethod for getting the definition of a specific method.

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

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

Aliases
  • nrow
  • ncol
  • NROW
  • NCOL
Examples
nrow
showMethods("nrow")
selectMethod("nrow", "ANY")  # the default method

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

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

NCOL
showMethods("NCOL")
selectMethod("NCOL", "ANY")  # the default method
Documentation reproduced from package BiocGenerics, version 0.18.0, License: Artistic-2.0

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