dplyr mutate in place [duplicate]

Answer 1

We can use the %<>% compound assignment operator from magrittr to change in place

library(magrittr)
df_test %<>% 
        mutate(a = round(a,0))

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If we are using data.table, the assignment (:=) operator does this in place too without copying

library(data.table)
setDT(df_test)[, a := round(a,0)]