R：如何将x聚合并分离为多个列？乐趣=独特

我正在按教育程度和id_学习汇总data.frame，我使用的功能是“独特的”

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我已经颠倒了公式中变量的顺序，它似乎做了你想要的

首先，一些数据准备代码，为它指定列名并强制类

data.frame

colnames(steps) <- c("id_study", "edu")
steps <- as.data.frame(steps)

db2 <- aggregate (id_study ~ edu, data = steps, FUN = unique)
db2
#  edu       id_study
#1  11 DZA_2003_STEPS
#2  12 DZA_2003_STEPS
#3   3 DZA_2003_STEPS
#4   6 DZA_2003_STEPS
#5   7 DZA_2003_STEPS
#6   9 DZA_2003_STEPS

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colnames（steps）可能列
edu
是一个因子，内部编码为整数。尝试
as.character（edu）
。您可以发布示例数据吗？请使用
dput（步骤）
的输出编辑问题。或者，如果输出的dput（head（steps，20））

@RuiBarradas太大，我已经按照要求进行了更新

structure(c("DZA_2003_STEPS", "DZA_2003_STEPS", "DZA_2003_STEPS", 
"DZA_2003_STEPS", "DZA_2003_STEPS", "DZA_2003_STEPS", "DZA_2003_STEPS", 
"DZA_2003_STEPS", "DZA_2003_STEPS", "DZA_2003_STEPS", "DZA_2003_STEPS", 
"DZA_2003_STEPS", "DZA_2003_STEPS", "DZA_2003_STEPS", "DZA_2003_STEPS", 
"DZA_2003_STEPS", "DZA_2003_STEPS", "DZA_2003_STEPS", "DZA_2003_STEPS", 
"DZA_2003_STEPS", "9", "7", "6", "9", "7", "6", "3", "12", "3", 
"3", "3", "3", "3", "6", "6", "3", "3", "6", "11", "7"), .Dim = c(20L, 
2L))

      [,id_study]      [edu]
 [1,] "DZA_2003_STEPS" "9" 
 [2,] "DZA_2003_STEPS" "7" 
 [3,] "DZA_2003_STEPS" "6" 
 [4,] "DZA_2003_STEPS" "9" 
 [5,] "DZA_2003_STEPS" "7" 
 [6,] "DZA_2003_STEPS" "6" 
 [7,] "DZA_2003_STEPS" "3" 
 [8,] "DZA_2003_STEPS" "12"
 [9,] "DZA_2003_STEPS" "3" 
 [10,] "DZA_2003_STEPS" "3" 
 [11,] "DZA_2003_STEPS" "3" 
 [12,] "DZA_2003_STEPS" "3" 
 [13,] "DZA_2003_STEPS" "3" 
 [14,] "DZA_2003_STEPS" "6" 
 [15,] "DZA_2003_STEPS" "6" 
 [16,] "DZA_2003_STEPS" "3" 
 [17,] "DZA_2003_STEPS" "3" 
 [18,] "DZA_2003_STEPS" "6" 
 [19,] "DZA_2003_STEPS" "11"
 [20,] "DZA_2003_STEPS" "7" 

colnames(steps) <- c("id_study", "edu")
steps <- as.data.frame(steps)

db2 <- aggregate (id_study ~ edu, data = steps, FUN = unique)
db2
#  edu       id_study
#1  11 DZA_2003_STEPS
#2  12 DZA_2003_STEPS
#3   3 DZA_2003_STEPS
#4   6 DZA_2003_STEPS
#5   7 DZA_2003_STEPS
#6   9 DZA_2003_STEPS