nrow {BiocGenerics} | R Documentation |
Return the number of rows or columns present in an array-like R 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.
nrow(x) ncol(x) NROW(x) NCOL(x)
x |
A matrix- or array-like R object. |
A single integer or NULL
.
Specific methods defined in other Bioconductor packages should behave as consistently as possible with the default methods.
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 IRanges package
for the nrow
method defined for DataFrame
objects.
BiocGenerics for a summary of all the generics defined in the BiocGenerics package.
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