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所以我试图用条件标记数据矩阵；但是，当我进行实验时，我有 3 个试管，前两个试管重复 7 次，第三试管重复 6 次。如何编码要重写的矩阵并忽略“丢失”数据：

dm$Strain<-dm$variable
dm$Strain<-rep(c("446-1", "446-2", "446-3"), each.out=193)
dm$Strain<-factor(dm$Strain)
levels(dm$Strain)

Error in $<-.data.frame(*tmp*, "Strain", value = c("446-1", "446-2",  : 
  replacement has 3 rows, data has 19300

Wells 中的数据设置：

1) Control  = 1, 16, 31, 46, 61, 76, 91 
2) LI 446-1 tube = 2, 17, 32, 47, 62, 77, 92
3) LI 446-1 10^7 = 3, 18, 33, 48, 63, 78, 93
4) LI 446-1 10^6 = 4, 19, 34, 49, 64, 79, 94
5) LI 446-1 10^5 = 5, 20, 35, 50, 65, 80, 95
6) Control = 6, 21, 36, 51, 66, 81, 96
7) LI-446-2 tube = 7, 22, 37, 52, 67, 82, 97
8) LI-446-2 10^7 = 8, 23, 38, 53, 68, 83, 98
9) LI-446-2 10^6 = 9, 24, 39, 54, 69, 84, 99
10) LI-446-2 10^5 = 10, 25, 40 ,55, 70, 85, 100
11) Control = 11, 26, 41, 56, 71, 86
12) LI-446-3 tube = 12, 27, 42, 57, 72, 87
13) LI-446-3 10^7 = 13, 28, 43, 58, 73, 88
14) LI-446-3 10^6 = 14, 29, 44, 59, 74, 89
15) LI-446-3 10^5 = 15, 30, 45, 60, 75, 90

我有 19300 列数据，其中 1:193 对应于 1 号井，间隔 15 分钟，194:386 对应于 2 号井，间隔 15 分钟，依此类推，直到 100 号井。但是，重复 446-3（上面的又名 11-15） 6次，446-1和446-2重复7次。

str(dm) 'data.frame': 19300 obs. of 4 variables: $ Time..mins.: int 15 30 45 60 75 90 105 120 135 150 ... $ variable : Factor w/ 100 levels "Well_1","Well_2",..: 1 1 1 1 1 1 1 1 1 1 ... $ value : num 0.439 0.204 0.191 0.187 0.185 0.19 0.187 0.19 0.188 0.191 ... $ Media : Factor w/ 2 levels "BHI","BHI_salt": 1 1 1 1 1 1 1 1 1 1 ...

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