Yanto,
There are many ways to it. The awk version of the solution will be like:
awk '{sum+=$2;print $1,sum}' inputfile
Where "inputfile" is your input. assume that the file contains lines of
similar pattern.
Regards
On Fri, 2008-06-20 at 16:32 +0200, Yanto Young wrote:
> Hi guys,
>
> I would like to know if there's a quick and dirty method (using
> bash/sed/awk) to perform the following:
>
> Original file:
> *******************
> t=0 1
> t=1 1
> t=2 -1
> t=3 1
> t=4 1
> t=5 -1
> *******************
>
> Desired result:
> *******************
> t=0 1
> t=1 2
> t=2 1
> t=3 2
> t=4 3
> t=5 2
> *******************
>
> that is, I would like to perform cumulative addition on the second column.
>
>
> Thanks.
>
> Best regards,
> Yanto
>
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