Scale only certain columns R [closed]

Answer 1

We can do this with lapply. Subset the columns of interest, loop through them with lapply, assign the output back to the subset of data. Here, we are using c because the outpuf of scale is a matrix with a single column. Using c or as.vector, it gets converted to vector

df[c(3,6)] <- lapply(df[c(3, 6), function(x) c(scale(x)))

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Or another option is mutate_at from dplyr

library(dplyr)
df %>%
   mutate_at(c(3,6), funs(c(scale(.))))