Center matrix (subtract row mean from each row)

After centering, rowsums sum to zero. Particularly useful when working with categorical data in log-space.

center(x)

Arguments

x	vector or matrix

Value

matrix with centered rows

Examples

x <- matrix(rnorm(100), 10, 10)
y <- center(x)
rowSums(y)
#>  [1]  7.632783e-17  1.665335e-16  5.551115e-16 -1.665335e-16 -4.440892e-16
#>  [6]  1.665335e-16 -2.498002e-16  5.551115e-17  1.387779e-16  2.220446e-16