how to increment a column value with 1 in a csv file












0















I have a text file with 3 columns as below.



$ cat test.txt

1,A,300

1,B,300

1,C,300


Now i want to increment the third column only,
the output should be like below



1,A,300

1,B,301

1,C,302


Till now i have tried as,



awk -F, '{$3=$3+1;print}' OFS=, test.txt


But output is coming as,



1,A,301

1,B,301

1,C,301


Please do suggest, how to achieve the desired output?






awk







share|improve this question
















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  • 1





    or keep a separate variable for the amount to increment, and increment that variable for each line: $3 += inc; inc++

    – glenn jackman
    Feb 1 '17 at 18:36


















0















I have a text file with 3 columns as below.



$ cat test.txt

1,A,300

1,B,300

1,C,300


Now i want to increment the third column only,
the output should be like below



1,A,300

1,B,301

1,C,302


Till now i have tried as,



awk -F, '{$3=$3+1;print}' OFS=, test.txt


But output is coming as,



1,A,301

1,B,301

1,C,301


Please do suggest, how to achieve the desired output?






awk







share|improve this question
















bumped to the homepage by Community♦ 1 min ago


This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.











  • 1





    or keep a separate variable for the amount to increment, and increment that variable for each line: $3 += inc; inc++

    – glenn jackman
    Feb 1 '17 at 18:36
















0












0








0








I have a text file with 3 columns as below.



$ cat test.txt

1,A,300

1,B,300

1,C,300


Now i want to increment the third column only,
the output should be like below



1,A,300

1,B,301

1,C,302


Till now i have tried as,



awk -F, '{$3=$3+1;print}' OFS=, test.txt


But output is coming as,



1,A,301

1,B,301

1,C,301


Please do suggest, how to achieve the desired output?






awk







share|improve this question
















I have a text file with 3 columns as below.



$ cat test.txt

1,A,300

1,B,300

1,C,300


Now i want to increment the third column only,
the output should be like below



1,A,300

1,B,301

1,C,302


Till now i have tried as,



awk -F, '{$3=$3+1;print}' OFS=, test.txt


But output is coming as,



1,A,301

1,B,301

1,C,301


Please do suggest, how to achieve the desired output?






awk




awk






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Feb 1 '17 at 18:35









glenn jackman

51.1k571110




51.1k571110










asked Feb 1 '17 at 18:23









swapneilswapneil

12




12





bumped to the homepage by Community♦ 1 min ago


This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.







bumped to the homepage by Community♦ 1 min ago


This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.










  • 1





    or keep a separate variable for the amount to increment, and increment that variable for each line: $3 += inc; inc++

    – glenn jackman
    Feb 1 '17 at 18:36
















  • 1





    or keep a separate variable for the amount to increment, and increment that variable for each line: $3 += inc; inc++

    – glenn jackman
    Feb 1 '17 at 18:36










1




1





or keep a separate variable for the amount to increment, and increment that variable for each line: $3 += inc; inc++

– glenn jackman
Feb 1 '17 at 18:36







or keep a separate variable for the amount to increment, and increment that variable for each line: $3 += inc; inc++

– glenn jackman
Feb 1 '17 at 18:36












2 Answers
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0














awk -F, 'BEGIN {offset=0; OFS=","} {print $1,$2,$3+offset++}"' /path/to/input


or, alternatively:



awk -F, 'BEGIN {OFS=","} {print $1,$2,$3+(NR-1)}"' /path/to/input





share|improve this answer































    0














    Your initial approach with a small tweak:



    awk -F',' 'BEGIN { OFS = FS } { $3 = $3 + (NR-1); print }' test.txt


    The NR variable holds the number of records (lines) read so far.






    share|improve this answer























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      2 Answers
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      2 Answers
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      0














      awk -F, 'BEGIN {offset=0; OFS=","} {print $1,$2,$3+offset++}"' /path/to/input


      or, alternatively:



      awk -F, 'BEGIN {OFS=","} {print $1,$2,$3+(NR-1)}"' /path/to/input





      share|improve this answer




























        0














        awk -F, 'BEGIN {offset=0; OFS=","} {print $1,$2,$3+offset++}"' /path/to/input


        or, alternatively:



        awk -F, 'BEGIN {OFS=","} {print $1,$2,$3+(NR-1)}"' /path/to/input





        share|improve this answer


























          0












          0








          0







          awk -F, 'BEGIN {offset=0; OFS=","} {print $1,$2,$3+offset++}"' /path/to/input


          or, alternatively:



          awk -F, 'BEGIN {OFS=","} {print $1,$2,$3+(NR-1)}"' /path/to/input





          share|improve this answer













          awk -F, 'BEGIN {offset=0; OFS=","} {print $1,$2,$3+offset++}"' /path/to/input


          or, alternatively:



          awk -F, 'BEGIN {OFS=","} {print $1,$2,$3+(NR-1)}"' /path/to/input






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Feb 1 '17 at 18:48









          DopeGhotiDopeGhoti

          44.3k55684




          44.3k55684

























              0














              Your initial approach with a small tweak:



              awk -F',' 'BEGIN { OFS = FS } { $3 = $3 + (NR-1); print }' test.txt


              The NR variable holds the number of records (lines) read so far.






              share|improve this answer




























                0














                Your initial approach with a small tweak:



                awk -F',' 'BEGIN { OFS = FS } { $3 = $3 + (NR-1); print }' test.txt


                The NR variable holds the number of records (lines) read so far.






                share|improve this answer


























                  0












                  0








                  0







                  Your initial approach with a small tweak:



                  awk -F',' 'BEGIN { OFS = FS } { $3 = $3 + (NR-1); print }' test.txt


                  The NR variable holds the number of records (lines) read so far.






                  share|improve this answer













                  Your initial approach with a small tweak:



                  awk -F',' 'BEGIN { OFS = FS } { $3 = $3 + (NR-1); print }' test.txt


                  The NR variable holds the number of records (lines) read so far.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Feb 1 '17 at 19:46









                  KusalanandaKusalananda

                  126k16239393




                  126k16239393






























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