R - Scaling numeric values only in a dataframe with mixed types

Question

I am working with a data frame that has mixed data types (numeric and character) and also has a character key as the primary identifier. I\'d like to scale and center the n

Answer 1

Something like this should do what you want:

library(MASS)
ind <- sapply(anorexia, is.numeric)
anorexia[ind] <- lapply(anorexia[ind], scale)