[英]Change position of elements 1:2 in a vector
我有這個向量:
vector_have <- c("A", "B", "C", "A1", "B2", "C3")
[1] "A" "B" "C" "A1" "B2" "C3"
我想得到:
vector_wanted <- c("A1", "A", "B2", "B", "C3", "C")
[1] "A1" "A" "B2" "B" "C3" "C"
我努力了:
sort(vector_have)
[1] "A" "A1" "B" "B2" "C" "C3"
現在我想將每個第二個元素的位置切換到前一個。
我認為它必須用 TRUE、FALSE 迭代地完成。
使用mixed_sort
就可以了
gtools::mixedsort(vector_have)
[1] "A1" "A" "B2" "B" "C3" "C"
或者如果它基於位置,另一個選項是matrix
c(matrix(vector_have, ncol = 3, byrow = TRUE)[2:1,])
[1] "A1" "A" "B2" "B" "C3" "C"
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