row.names
Row Names Attribute
Description
Returns or changes the row.names attribute of a data frame, an array, or a matrix.
Usage
row.names(x)
row.names(x) <- value
Arguments
| x |
any object; usually a data frame.
|
| value |
a vector with the same length as the number of rows
in x. (If value is not a vector of character strings, it
is coerced to one.)
|
Details
The value can be a character vector or anything that
can be coerced to a character vector.
Value
returns a character vector containing the row names.
Side Effects
In the assignment form, the row names of x
are changed to value.
Differences between Spotfire Enterprise Runtime for R and Open-source R
Unlike Spotfire Enterprise Runtime for R, open-source R has no function rowIds.
See Also
Examples
# create a data frame, with the row names as default.
df <- data.frame(c(1, 2, 3, 4))
row.names(df)
# [1] "1" "2" "3" "4"
row.names(df) <- c("a", "b", "c", "d")
row.names(df)
# [1] "a" "b" "c" "d"