實現矩陣的轉置

測試文件：

1 2 3 4

5 6 7 8

9 10 11 12

轉置後效果

1 5 9
2 6 10
3 7 11
4 8 12
代碼名：transpose內容如下：

#! /bin/bash
exec awk '
NR == 1 {
    n = NF
    for (i = 1; i <= NF; i++)
        row[i] = $i
    next
}
{
    if (NF > n)
       n = NF
    for (i = 1; i <= NF; i++)
        row[i] = row[i] " " $i
}
END{
   for (i = 1; i <= n; i++)
        print row[i]
}' ${1+"$@"}

文件名爲：test

#chmod u+x transpose

#./transpose test