| dimnames {base} | R Documentation |
Dimnames of an Object
Description
Retrieve or set the dimnames of an object.
Usage
dimnames(x)
dimnames(x) <- nlist
Arguments
x |
an R object, for example a matrix, array or data frame. |
nlist |
a possible value for |
Details
The functions dimnames and dimnames<- are generic.
For an array (and hence in particular, for a
matrix), they retrieve or
set the dimnames attribute (see attributes) of the
object. The list nlist can have names, and these will be
used to label the dimensions of the array where appropriate.
Both have methods for data frames. The dimnames of a data frame are
its row.names attribute and its names.
Value
The dimnames of a matrix or array can be NULL or a list of the
same length as dim(x). If a list, its components are either
NULL or a character vector the length of the appropriate
dimension of x.
References
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth \& Brooks/Cole.
See Also
rownames, colnames;
array, matrix, data.frame.
Examples
## simple versions of rownames and colnames
## could be defined as follows
rownames0 <- function(x) dimnames(x)[[1]]
colnames0 <- function(x) dimnames(x)[[2]]