Question

我有一个包含字符和数字值的字符串向量。例如：

a=c("ILLUMINA:420:C2D7UACXX:1:1102:14591:91480","ILLUMINA:420:C2D7UACXX:1:1102:14592:3881","ILLUMINA:420:C2D7UACXX:1:1102:14592:37103","ILLUMINA:420:C2D7UACXX:1:1102:14592:37356")

我想订购矢量，以便字符按字母顺序排序，数字按数字排序。字符串的结构总是具有以下格式： "ILLUMINA:420:C2D7UACXX:1:<number>:<number>:<number>"，所以实际上该命令仅适用于最后三个冒号分隔的数字。

我确实尝试mixedsort {gtools}，但结果与使用sort和

相同

sort.int，即：

> mixedsort(a)
[1] "ILLUMINA:420:C2D7UACXX:1:1102:14591:91480" "ILLUMINA:420:C2D7UACXX:1:1102:14592:37103"
[3] "ILLUMINA:420:C2D7UACXX:1:1102:14592:37356" "ILLUMINA:420:C2D7UACXX:1:1102:14592:3881"

显然，正确的顺序应该是：

[1] "ILLUMINA:420:C2D7UACXX:1:1102:14591:91480" "ILLUMINA:420:C2D7UACXX:1:1102:14592:3881" 
[3] "ILLUMINA:420:C2D7UACXX:1:1102:14592:37103" "ILLUMINA:420:C2D7UACXX:1:1102:14592:37356"

有没有立即解决方案？

Answer 1

编辑在OP澄清后完全更改解决方案

您可以提取最后3个元素和顺序，然后创建data.frame：

dat = read.table(text=sub('.*:1:([0-9]+):([0-9]+):([0-9]+)','\\1|\\2|\\3',a),sep='|')
 dat
    V1    V2    V3
1 1102 14591 91480
2 1102 14592  3881
3 1102 14592 37103
4 1102 14592 37356

然后您使用3列订购：

 a[with(dat,order(V1,V2,V3))]
[1] "ILLUMINA:420:C2D7UACXX:1:1102:14591:91480" "ILLUMINA:420:C2D7UACXX:1:1102:14592:3881" 
[3] "ILLUMINA:420:C2D7UACXX:1:1102:14592:37103" "ILLUMINA:420:C2D7UACXX:1:1102:14592:37356"

Answer 2

gtools :: mixedsort确实适用于你的情况，实际上是：

> a=c("ILLUMINA:420:C2D7UACXX:1:1102:14591:91480",
      "ILLUMINA:420:C2D7UACXX:1:1102:14592:3881",
      "ILLUMINA:420:C2D7UACXX:1:1102:14592:37103",
      "ILLUMINA:420:C2D7UACXX:1:1102:14592:37356")
> 
> mixedsort(a)
[1] "ILLUMINA:420:C2D7UACXX:1:1102:14591:91480"
[2] "ILLUMINA:420:C2D7UACXX:1:1102:14592:3881" 
[3] "ILLUMINA:420:C2D7UACXX:1:1102:14592:37103"
[4] "ILLUMINA:420:C2D7UACXX:1:1102:14592:37356"

我正在使用gtools_3.4.2和R-3.2.0

Answer 3

这是一个更快的解决方案：

fields.list = strsplit(a,split=":")
sort.dt = data.table(t(sapply(fields.list,function(x) as.numeric(c(x[5],x[6],x[7])))))
sorted.a = v[with(sort.dt,order(V1,V2,V3))]
> sorted.a
[1] "ILLUMINA:420:C2D7UACXX:1:1102:14591:91480" "ILLUMINA:420:C2D7UACXX:1:1102:14592:3881"  "ILLUMINA:420:C2D7UACXX:1:1102:14592:37103"
[4] "ILLUMINA:420:C2D7UACXX:1:1102:14592:37356"

R：按字母顺序和数字顺序排列字符和矢量的字符串向量

3 个答案: