如何按浮點數對行進行排序

我有這樣一個文件：

name: xxx --- time: 5.4 seconds
name: yyy --- time: 3.2 seconds
name: zzz --- time: 6.4 seconds
...

現在我想通過這些浮點數對這個文件進行排序以生成一個新文件，如下所示：

name: yyy --- time: 3.2 seconds
name: xxx --- time: 5.4 seconds
name: zzz --- time: 6.4 seconds
...

我已經嘗試過該命令awk '{print $5}' myfile | sort -g，但這只會顯示浮點數。

如果使用 GNUsort或兼容的，您可以使用其-g開關進行一般數字排序：

$ sort -g -k5,5 file
name: yyy --- time: 3.2 seconds
name: xxx --- time: 5.4 seconds
name: zzz --- time: 6.4 seconds

-k5,5告訴 sort 只對第 5 列執行排序。

用法

請記住info sort頁面中的詳細資訊：

'--general-numeric-sort'
'--sort=general-numeric'
     Sort numerically, converting a prefix of each line to a long
     double-precision floating point number.  *Note Floating point::.
     Do not report overflow, underflow, or conversion errors.  Use the
     following collating sequence:

        * Lines that do not start with numbers (all considered to be
          equal).
        * NaNs ("Not a Number" values, in IEEE floating point
          arithmetic) in a consistent but machine-dependent order.
        * Minus infinity.
        * Finite numbers in ascending numeric order (with -0 and +0
          equal).
        * Plus infinity.

     Use this option only if there is no alternative; it is much slower
     than '--numeric-sort' ('-n') and it can lose information when
     converting to floating point.

引用自：https://unix.stackexchange.com/questions/459257