I'm trying to remove dependency on plyr and have a line which uses the dlply function.

translation <- dlply(data ,.(key), function(s) key = as.list(s))

I've tried to use lapply and split based on a previous answer but cannot work out how to translate the key and as.list parts.

CodePudding user response：

If we want to get similar structure, use split and then unclass

lapply(split(data, data$key), unclass)

-testing

lapply(split(head(mtcars), head(mtcars)$cyl), unclass)