r - 将向量列表转换为数据框

Question

我有一个向量列表。这个向量由名称 A1,A2.. 和数值组成:

a <- list()
a$`p1`["A1"] <- 1
a$`p1`["A2"] <- 0.5
a$`p1`["A3"] <- 0.3
a$`p2`["A3"] <- 2
a$`p2`["A4"] <- 2.5
a$`p2`["A5"] <- 2.3

我希望将其转换为具有以下结构的数据框

P <- c("p1","p1","p1","p2","p2","p2")
A <- c("A1","A2","A3","A3","A4","A5")
V <- c(1,0.5,0.3,2,2.5,2.3)
out <- data.frame(P,A,V)

谢谢 :)

Answer 1

一 purrr和 tibble选项可以是:

map_dfr(a, ~ enframe(., name = "A", value = "V"), .id = "P")

  P     A         V
  <chr> <chr> <dbl>
1 p1    A1      1  
2 p1    A2      0.5
3 p1    A3      0.3
4 p2    A3      2  
5 p2    A4      2.5
6 p2    A5      2.3