相关疑难解决方法(0)

在map嵌套的data_frame上使用时,我不明白为什么后两个版本会出错,我应该如何使用dot(.)？

library(tidyverse)
# dummy data
df <- tibble(id = rep(1:10, each = 10), 
                 val = runif(100))
df <- nest(df, -id)

# works as expected
map(df$data, min)
df %>% .$data %>% map(., min)

# gives an error
df %>% map(.$data, min)
# Error: Don't know how to index with object of type list at level 1

df %>% map(data, min)