... <看更多>

You should place the final object, that should store the result, at the beginning: library(dplyr) df <- data.frame(name=c("A","A","A","B" ... ... <看更多>

@rdname mutate. #' @param .keep `r lifecycle::badge("experimental")`. #' Control which columns from `.data` are retained in the output. Grouping. ... <看更多>

Apply a function over rows of a matrix using mutate, rowwise, etc. 1.1 Set up Input Arrays. There is a function that takes M=Q ... ... <看更多>

Why don't you solve it in this way? mutate(gateway, YearlyHit = case_when(Frequency == 'Year' ~ 1, Frequency == 'Month' ~ 12, Frequency == 'Week' ~ 48) ). ... <看更多>