Re: delete columns csv file

On Apr 17, 12:55=A0am, Janis Papanagnou <Janis_Papanag...@[EMAIL PROTECTED]
>
wrote:
> It's good style (and a sign of respect for the people trying to help
> you) to quote enough context to make any posting self-contained.
>
Oops, sorry I didn't know of that convention, with this in mind...

Considering this file kindly published by EM:

awk -F, '
NR=3D=3DFNR {
   if (NR>1)
      for (i=3D1;i<=3DNF;i++)
         if ($i"" !=3D "0.0e0")
            good[i]
   next
}

{  out=3Dsep=3D""
   for (i=3D1;i<=3DNF;i++) {
       if (i in good)
          out =3D out sep $i
       sep=3DFS
   } print out

}' file file

So far since last correspondence I've understood the 'if' and 'for'
statements but not understood why 'good[i] is written> The guide
states that 'then' statement is optional, but I would expected
something like:

then [i]=3Dgood

I also understand the next statement and the '!' not boolean function,
but so far haven't found an explanation for 'out'. Any help please?

Thanks,