AWK从csv连接下两行

我正在使用以下命令连接下一行，但希望连接下两行

awk -v OFS=', ' 'NR==1{first=$0} NR>1{print prev, $0} {prev=$0} END{print prev, first}' test.csv

test.csv

rabbit
cat
dog
turtle
sheep
cow

结果:

rabbit, cat
cat, dog
dog, turtle
turtle, sheep
sheep, cow
cow, rabbit

预期结果：

rabbit, cat, dog
cat, dog, turtle
dog, turtle, sheep
turtle, sheep, cow
sheep, cow, rabbit
cow, rabbit, cat

---

如果您有任何帮助，我们将不胜感激。

请尝试以下内容，用GNU awk编写。仅使用所示样品进行书写和测试

awk -v RS= -v OFS=', ' '
{
  for(i=1;i<=(NF-1);i++){
     printf("%s %s %s %s\n",$i,OFS $(i+1),OFS $(i+2),i==(NF-1)?$1:"")
  }
}
END{
  print $NF,$1,$2
}
' Input_file

说明：增加对以上内容的详细说明

awk -v RS= -v OFS=', ' '                     ##Starting awk program from here.
{
  for(i=1;i<=(NF-1);i++){                    ##Running for loop from 1to till 2nd last element of line.
     printf("%s %s %s %s\n",$i,OFS $(i+1),OFS $(i+2),i==(NF-1)?$1:"")    ##Printing current field, OFS next field and next to next field and checking condition if i==NF-1 then print 1st field else print nothing.
  }
}
END{                                         ##Starting END block for this code from here.
  print $NF,$1,$2                            ##Printing last field then 1st and 2nd field here.
}
' Input_file                                 ##Mentioning Input_file name here.

---

只需将完整文件读入内存，然后操作列：

$ awk -v OFS="," -v n=3 '{a[NR-1]=$0}END{for(i=0;i<NR;++i) for(j=0;j<n;++j) printf "%s%s",a[(i+j)%NR], (j==n-1?ORS:OFS)}' file