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標(biāo)題: AWK如何處理N多列的列參數(shù)？ [打印本頁(yè)]

作者: hosyp 時(shí)間: 2010-02-03 11:25
標(biāo)題: AWK如何處理N多列的列參數(shù)？
我有個(gè)文件有幾百列不定，要得到其中指定列，已求出指定列的列數(shù)，是一個(gè)字符串，如“$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18”，
如何讓AWK調(diào)用它？
用aa=“$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18”, awk '{print aaa}' aaa=$aa source.txt 只能得到如下結(jié)果，而不是我要的值：
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,
$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18,

作者: justlooks 時(shí)間: 2010-02-03 11:30
直接awk '{print $1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18}' 不行？

作者: hosyp 時(shí)間: 2010-02-03 11:33
本帖最后由 hosyp 于 2010-02-03 11:36 編輯

事先不知道是哪幾個(gè)列呀，這是算出來(lái)的呀
有一個(gè)設(shè)置文件存的是所有需要的列，我用shell找出需要列在源文件中的列號(hào)，得出這么個(gè)字符串，換個(gè)源文件列號(hào)就變了

作者: wtuter 時(shí)間: 2010-02-03 11:34
回復(fù) 1# hosyp

aa=“1,2,9,11,91,4,5,25,99，6,18”, awk '{print $aaa}' aaa=$aa source.txt

作者: beginner-bj 時(shí)間: 2010-02-03 11:41
這樣的問(wèn)題，用eval。

作者: hosyp 時(shí)間: 2010-02-03 11:41
回復(fù) 4# wtuter

這樣不行，只能打出第一列

作者: ywlscpl 時(shí)間: 2010-02-03 11:54
本帖最后由 ywlscpl 于 2010-02-03 11:58 編輯

a='$1,$2,$9,$11,$91,$4,$5,$25,,$99,$6,$18'
awk "{print $a}" file

作者: hosyp 時(shí)間: 2010-02-03 13:11
我試了一下，用如下語(yǔ)句可以：
aa='$1,$2,$9,$11,$91,$4,$5,$25,$99,$6,$18'
echo '{print '$aa'}'>progfile
awk -F, -f progfile source.txt

作者: iori809 時(shí)間: 2010-02-03 13:24
恩沒(méi)錯(cuò)~ 解決思路就是絕對(duì)引用和部分引用的區(qū)別

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