Convert centiles into Z-scores

Functions z2p() and p2z() functions are the inverse of each other.

p2z(p, scale = 100)

Arguments

p: A numerical vector with centiles.
scale: The maximum of the scale. The default (100) returns for percentiles. Set scale = 1 to obtain probabilities.

A vector with length(p) elements containing centiles.

Stef van Buuren, 2021

p <- c(2.5, 10, 50, 90, 97.5)
p2z(p)
#> [1] -1.959964 -1.281552  0.000000  1.281552  1.959964