| attributes {base} | R Documentation |
These functions access an object's attribute list. The first form above returns the an object's attribute list. The assignment forms make the list on the right-hand side of the assignment the object's attribute list (if appropriate).
attributes(obj) attributes(obj) <- value mostattributes(obj) <- value
obj |
an object |
value |
an appropriate attribute list, or NULL. |
The mostattributes assignment takes special care for the
dim, names and dimnames
attributes, and assigns them only when that is valid whereas as
attributes assignment would give an error in that case.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
attr.
x <- cbind(a=1:3, pi=pi) # simple matrix w/ dimnames
attributes(x)
## strip an object's attributes:
attributes(x) <- NULL
x # now just a vector of length 6
mostattributes(x) <- list(mycomment = "really special", dim = 3:2,
dimnames = list(LETTERS[1:3], letters[1:5]), names = paste(1:6))
x # dim(), but not {dim}names