使用 AWK 进行简单的数据转换

Question

我有一些这种格式的数据；-

Type,Fac1,Fac2,Fac3
1,0.1,0.1,0.1
2,0.2,0.2,0.2
3,0.3,0.3,0.3

使用 AWK，我需要转换数据，使其看起来像这样；-

Type
1,Fac1,0.1
1,Fac2,0.1
1,Fac3,0.1
2,Fac1,0.2
2,Fac2,0.2
2,Fac3,0.2
3,Fac1,0.3
3,Fac2,0.3
3,Fac3,0.3

换句话说，一种从水平向垂直转变的“枢轴”动作。

所以我试过这个：

awk -F ',' '{for (i=2;i<=NF;i++) { if (i==2) {print $1"," $i } else print $1"," $i}}'

Answer 1

$ cat tst.awk
BEGIN { FS=OFS="," }
NR==1 {
    print $1
    split($0,tags)
    next
}
{
    for (i=2; i<=NF; i++) {
        print $1, tags[i], $i
    }
}

$ awk -f tst.awk file
Type
1,Fac1,0.1
1,Fac2,0.1
1,Fac3,0.1
2,Fac1,0.2
2,Fac2,0.2
2,Fac3,0.2
3,Fac1,0.3
3,Fac2,0.3
3,Fac3,0.3