r - dplyr::do() requires named function? -

r - dplyr::do() requires named function? -

the next works fine:

library(dplyr) m <- function(df) { mod <- lm(sepal.length ~ sepal.width, info = df) pred <- predict(mod,newdata = df["sepal.width"]) data.frame(df,pred) } iris %>% group_by(species) %>% do(m(.))

i thought work if used anonymous function, not:

iris %>% group_by(species) %>% do(function(df) { mod <- lm(sepal.length ~ sepal.width, info = df) pred <- predict(mod,newdata = df["sepal.width"]) data.frame(df,pred) }) error: results not info frames @ positions: 1, 2, 3

you don't need anonymous function:

library(dplyr) iris %>% group_by(species) %>% do({ mod <- lm(sepal.length ~ sepal.width, info = .) pred <- predict(mod, newdata = .["sepal.width"]) data.frame(., pred) })

r dplyr