| dimnames {base} | R Documentation |
Retrieve or set the dimnames of an object.
dimnames(x) dimnames(x) <- value
x |
an R object, for example a matrix, array or data frame. |
value |
a possible value for dimnames(x): see
“Value”. |
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
value 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.
As from R 1.8.0 factor components of value will be coerced to
character.
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.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
rownames, colnames;
array, matrix, data.frame.
## simple versions of rownames and colnames ## could be defined as follows rownames0 <- function(x) dimnames(x)[[1]] colnames0 <- function(x) dimnames(x)[[2]]