Change dimnames, rownames, or colnames

These functions provide an easy way to change the dimnames, rownames or colnames of an array.

Usage

dimrename(x, dim = 1, ..., gsub = FALSE, fixed = TRUE, warn = TRUE)
rowrename(x, ..., gsub = FALSE, fixed = TRUE, warn = TRUE)
colrename(x, ..., gsub = FALSE, fixed = TRUE, warn = TRUE)

Arguments

x: An array with dimnames
dim: A vector that indicates the dimensions
...: A sequence of named arguments
gsub: a logical value; if TRUE, gsub is used to change the dimnames of the object. That is, instead of substituting whole names, substrings of the dimnames of the object can changed.
fixed: a logical value, passed to gsub. If TRUE, substitutions are by fixed strings and not by regular expressions.
warn: logical; should a warning be issued if the pattern is not found?

Details

dimrename changes the dimnames of x along dimension(s) dim according to the remaining arguments. The argument names are the old names, the values are the new names. rowrename is a shorthand for changing the rownames, colrename is a shorthand for changing the colnames of a matrix or matrix-like object.

If gsub is FALSE, argument tags are the old dimnames, the values are the new dimnames. If gsub is TRUE, arguments are substrings of the dimnames that are substituted by the argument values.

Value

Object x with changed dimnames.

Examples

m <- matrix(1,2,2)
rownames(m) <- letters[1:2]
colnames(m) <- LETTERS[1:2]
m
#>   A B
#> a 1 1
#> b 1 1
dimrename(m,1,a="first",b="second")
#>        A B
#> first  1 1
#> second 1 1
dimrename(m,1,A="first",B="second")
#> Warning: unused dimname(s) selected
#> Warning: unused dimname(s) selected
#>   A B
#> a 1 1
#> b 1 1
dimrename(m,2,"A"="first",B="second")
#>   first second
#> a     1      1
#> b     1      1

rowrename(m,a="first",b="second")
#>        A B
#> first  1 1
#> second 1 1
colrename(m,"A"="first",B="second")
#>   first second
#> a     1      1
#> b     1      1

# Since version 0.99.22 - the following also works:

dimrename(m,1,a=first,b=second)
#>        A B
#> first  1 1
#> second 1 1
dimrename(m,1,A=first,B=second)
#> Warning: unused dimname(s) selected
#> Warning: unused dimname(s) selected
#>   A B
#> a 1 1
#> b 1 1
dimrename(m,2,A=first,B=second)
#>   first second
#> a     1      1
#> b     1      1