Center and scale a set of variables.

Source: R/center_scale.R

Center and scale a set of variables. Other columns are passed through.

center_scale(d, center, scale)

Arguments

d

data.frame to work with
center

named vector of variables to center
scale

named vector of variables to scale

Value

d with centered and scaled columns altered

Examples


d <- data.frame(x = 1:5, 
                y = c('a', 'a', 'b', 'b', 'b'))
vars_to_transform = "x"
t <- base::scale(as.matrix(d[, vars_to_transform, drop = FALSE]), 
                 center = TRUE, scale = TRUE)
t

#>               x
#> [1,] -1.2649111
#> [2,] -0.6324555
#> [3,]  0.0000000
#> [4,]  0.6324555
#> [5,]  1.2649111
#> attr(,"scaled:center")
#> x 
#> 3 
#> attr(,"scaled:scale")
#>        x 
#> 1.581139 

centering <- attr(t, "scaled:center")
scaling <- attr(t, "scaled:scale")
center_scale(d, center = centering, scale = scaling)

#>            x y
#> 1 -1.2649111 a
#> 2 -0.6324555 a
#> 3  0.0000000 b
#> 4  0.6324555 b
#> 5  1.2649111 b