row

0th

Percentile

Row Indexes

Returns a matrix of integers indicating their row number in a matrix-like object, or a factor indicating the row labels.

Keywords
array
Usage
row(x, as.factor = FALSE)
Arguments
x
a matrix-like object, that is one with a two-dimensional dim.
as.factor
a logical value indicating whether the value should be returned as a factor of row labels (created if necessary) rather than as numbers.
Value

An integer (or factor) matrix with the same dimensions as x and whose ij-th element is equal to i (or the i-th row label).

References

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.

See Also

col to get columns.

Aliases
  • row
Examples
library(base) x <- matrix(1:12, 3, 4) # extract the diagonal of a matrix dx <- x[row(x) == col(x)] dx # create an identity 5-by-5 matrix x <- matrix(0, nrow = 5, ncol = 5) x[row(x) == col(x)] <- 1 x
Documentation reproduced from package base, version 3.1.3, License: Part of R 3.1.3

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