r - double 型对象(字符和数字)到数据框

Question

我想从包含字符和数字的“双”对象创建一个数据框(以便过滤)。 我的代码:

  select(Tick,Date,Return) %>% 
  pivot_wider(names_from = Tick,values_from = Return) %>% 
  select(-Date) %>% 
  colMeans()*100```

Answer 1

输出是一个命名向量。我们可以堆叠它来创建一个包含两列的data.frame

library(dplyr)
library(tidyr)
select(Tick,Date,Return) %>% 
  pivot_wider(names_from = Tick,values_from = Return) %>% 
  select(-Date) %>% 
  {colMeans(.)*100} %>%
  stack

---

或者使用pivot_longer

select(Tick,Date,Return) %>% 
  pivot_wider(names_from = Tick,values_from = Return) %>% 
  select(-Date) %>% 
  {colMeans(.)*100 }%>%
  pivot_longer(cols = everything())