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UNIX for Dummies Questions & Answers
Identifying the first line that has zeros
Post 302536501 by ctsgnb on Tuesday 5th of July 2011 03:21:58 PM
07-05-2011
Quote:
Code:
$ awk '!$2&&!c++{print "The first zero for file1 is " NR}' tst
The first zero for file1 is 15Code:
awk '!$2&&!c++{print "The first zero for " FILENAME " is " NR}' yourfileCode:
[ctsgnb@shell ~]$ cat tst 9350. 0.288426 9370. 0.320469 9390. 0.394475 9630. 0 9650. 0 9890. 0 9910. 0 9930. 0 [ctsgnb@shell ~]$ cat tst2 9590. 0.379067 9610. 0.0246704 9620. 0 9630. 0 9640. 0 9650. 0 9660. 0 [ctsgnb@shell ~]$ awk '!$2&&!c++{print "The first zero for " FILENAME " is " NR}' tst The first zero for tst is 4 [ctsgnb@shell ~]$ awk '!$2&&!c++{print "The first zero for " FILENAME " is " NR}' tst2 The first zero for tst2 is 3
but my code may behave erroneously : if no value exists in $2 it will report the line number, so maybe you would prefer ygemici code which also have the advantage not to scan further line as soon as the first "2cnd-column-equal-zero" line has been found
Code:
awk '$2~/^0$/{print "The first zero for " FILENAME " is " NR;exit}' inputLast edited by ctsgnb; 07-05-2011 at 04:15 PM..
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