如何找到R中序列的运行次数？
有时，数据被记录为一个数字值或字符串序列，我们可能会找到每个序列的频率。这有助于我们检查运行中的变化，但必须确保总频率等于总数值，否则我们的频率计算将不正确。要找到运行次数，我们可以在R中使用rle函数代表运行长度编码。
例子
x1<-rep(c(1:5),10)
x1
[1] 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3
[39] 4 5 1 2 3 4 5 1 2 3 4 5
rle(x1)
Run Length Encoding
lengths: int [1:50] 1 1 1 1 1 1 1 1 1 1 ...
values : int [1:50] 1 2 3 4 5 1 2 3 4 5 ...
x2<-rep(c(1:5),each=10)
x2
[1] 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4
[39] 4 4 5 5 5 5 5 5 5 5 5 5
rle(x2)
Run Length Encoding
lengths: int [1:5] 10 10 10 10 10
values : int [1:5] 1 2 3 4 5
x3<-rep(c(2,3,4,5),times=c(20,14,18,21))
x3
[1] 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4
[39] 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
rle(x3)
Run Length Encoding
lengths: int [1:4] 20 14 18 21
values : num [1:4] 2 3 4 5
x4<-rep(c(0,1,1,0,1,0,1,0,1),times=c(4,8,6,4,9,16,7,8,12))
x4
[1] 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0
[39] 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1
rle(x4)
Run Length Encoding
lengths: int [1:8] 4 14 4 9 16 7 8 12
values : num [1:8] 0 1 0 1 0 1 0 1
x5<-rep(c(0,1,1,0,1,0,1,0,1),times=c(40,18,26,24,19,16,27,28,12))
x5
[1] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
[38] 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
[75] 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1
[112] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1
[149] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
[186] 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1
rle(x5)
Run Length Encoding
lengths: int [1:8] 40 44 24 19 16 27 28 12
values : num [1:8] 0 1 0 1 0 1 0 1
x6<-rep(c(LETTERS[1:9]),times=c(40,18,26,24,19,16,27,28,12))
x6
[1] "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A"
[19] "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" "A"
[37] "A" "A" "A" "A" "B" "B" "B" "B" "B" "B" "B" "B" "B" "B" "B" "B" "B" "B"
[55] "B" "B" "B" "B" "C" "C" "C" "C" "C" "C" "C" "C" "C" "C" "C" "C" "C" "C"
[73] "C" "C" "C" "C" "C" "C" "C" "C" "C" "C" "C" "C" "D" "D" "D" "D" "D" "D"
[91] "D" "D" "D" "D" "D" "D" "D" "D" "D" "D" "D" "D" "D" "D" "D" "D" "D" "D"
[109] "E" "E" "E" "E" "E" "E" "E" "E" "E" "E" "E" "E" "E" "E" "E" "E" "E" "E"
[127] "E" "F" "F" "F" "F" "F" "F" "F" "F" "F" "F" "F" "F" "F" "F" "F" "F" "G"
[145] "G" "G" "G" "G" "G" "G" "G" "G" "G" "G" "G" "G" "G" "G" "G" "G" "G" "G"
[163] "G" "G" "G" "G" "G" "G" "G" "G" "H" "H" "H" "H" "H" "H" "H" "H" "H" "H"
[181] "H" "H" "H" "H" "H" "H" "H" "H" "H" "H" "H" "H" "H" "H" "H" "H" "H" "H"
[199] "I" "I" "I" "I" "I" "I" "I" "I" "I" "I" "I" "I"
rle(x6)
Run Length Encoding
lengths: int [1:9] 40 18 26 24 19 16 27 28 12
values : chr [1:9] "A" "B" "C" "D" "E" "F" "G" "H" "I"
x7<-rep(c("India","Russia","China","Canada","Belarus","Indonesia","United Kingdom","Sudan"),times=c(13,11,10,10,12,11,14,12))
x7
[1] "India" "India" "India" "India"
[5] "India" "India" "India" "India"
[9] "India" "India" "India" "India"
[13] "India" "Russia" "Russia" "Russia"
[17] "Russia" "Russia" "Russia" "Russia"
[21] "Russia" "Russia" "Russia" "Russia"
[25] "China" "China" "China" "China"
[29] "China" "China" "China" "China"
[33] "China" "China" "Canada" "Canada"
[37] "Canada" "Canada" "Canada" "Canada"
[41] "Canada" "Canada" "Canada" "Canada"
[45] "Belarus" "Belarus" "Belarus" "Belarus"
[49] "Belarus" "Belarus" "Belarus" "Belarus"
[53] "Belarus" "Belarus" "Belarus" "Belarus"
[57] "Indonesia" "Indonesia" "Indonesia" "Indonesia"
[61] "Indonesia" "Indonesia" "Indonesia" "Indonesia"
[65] "Indonesia" "Indonesia" "Indonesia" "United Kingdom"
[69] "United Kingdom" "United Kingdom" "United Kingdom" "United Kingdom"
[73] "United Kingdom" "United Kingdom" "United Kingdom" "United Kingdom"
[77] "United Kingdom" "United Kingdom" "United Kingdom" "United Kingdom"
[81] "United Kingdom" "Sudan" "Sudan" "Sudan"
[85] "Sudan" "Sudan" "Sudan" "Sudan"
[89] "Sudan" "Sudan" "Sudan" "Sudan"
[93] "Sudan"
rle(x7)
Run Length Encoding
lengths: int [1:8] 13 11 10 10 12 11 14 12
values : chr [1:8] "India" "Russia" "China" "Canada" "Belarus" "Indonesia" ...