row/colnames {base} | R Documentation |
Retrieve or set the row or column names of an object (the first or
second component of its dimnames
).
rownames(x, do.NULL = TRUE, prefix = "row") rownames(x) <- namevector colnames(x, do.NULL = TRUE, prefix = "col") colnames(x) <- namevector
If do.NULL
is FALSE
, a character vector (of length
NROW(x)
or NCOL(x)
is returned in any
case, prepending prefix
to simple numbers, if
dimnames(x)[[i]]
(i =
1 or 2) is NULL
.
dimnames
, case.names
,
variable.names
.
m0 <- matrix(NA, 4, 0) m2 <- cbind(1,1:4) rownames(m0) colnames(m2, do.NULL = FALSE) colnames(m2) <- c("x","Y") rownames(m2) <- rownames(m2, do.NULL = FALSE, prefix = "Obs.") m2