如何在数据框中有条件地将一组行传输到第一行的末尾

Question

我需要将每个参与者的所有行都放在一行中，因为我想运行重复测量方差分析。

我现在的数据框：

eyetracking <- data.frame(
  participant = c("s001","s001","s001","s002","s002","s002","s003","s003","s003"),
  trial = c(1,2,3,1,2,3,1,2,3),
  picture = c("A","C","B","C","A","B","B","A","C"),
  response_time = c("2315","2513","2145","1902","2562","2723","2465","2317","2156"))

participant trial picture response_time
       s001     1       A          2315  
       s001     2       C          2513 
       s001     3       B          2145 
       s002     1       C          1902
       s002     2       A          2562 
       s002     3       B          2723 
       s003     1       B          2465 
       s003     2       A          2317 
       s003     3       C          2156

我需要的样子

participant trial_1 picture_1 response_time_1 trial_2 picture_2 response_time_2  trial_3 picture_3 response_time_3
       s001     1       A          2315             2         C            2513        3         B            2145   
       s002     1       C          1902             2         A            2562        3         B            2723
       s003     1       B          2465             2         A            2317        3         C            2156

我尝试做的但失败了，因为那时我必须为每 122 名参与者手动编写此代码并再次加入他们：

s001a <- data.frame(eyetracking[1,])
s001b <- data.frame(eyetracking[2,])
s001c <- data.frame(eyetracking[3,])

colnames(s001a) <- paste(colnames(s001a),"1",sep="_")
colnames(s001a)[1] <- "participant"
colnames(s001b) <- paste(colnames(s001b),"2",sep="_")
colnames(s001b)[1] <- "participant"
colnames(s001c) <- paste(colnames(s001c),"3",sep="_")
colnames(s001c)[1] <- "participant"

library(plyr)
s001all <- join_all(list(s001a,s001b,s001c), by='participant', type='left')

Answer 1

这是一个快速的方法：

library(tidyr)
pivot_wider(eyetracking,
            names_from = trial,
            values_from = 3:4)
# A tibble: 3 × 7
  participant picture_1 picture_2 picture_3 response_time_1 response_time_2 response_time_3
  <chr>       <chr>     <chr>     <chr>     <chr>           <chr>           <chr>          
1 s001        A         C         B         2315            2513            2145           
2 s002        C         A         B         1902            2562            2723           
3 s003        B         A         C         2465            2317            2156

我在这里冒昧地删除了以 trial 开头的（现已过时的）列。如果您想保留它们，只需将 values_from = 3:4 替换为 values_from = 2:4。

如何在数据框中有条件地将一组行传输到第一行的末尾

How to transfer a set of rows to the end of the first row with conditional in a data frame

r

rows

dataframe