On 11/4/06, Les Mikesell <lesmikesell@xxxxxxxxx> wrote:
> > > >I am looking for an automatic way of transforming my text file into
> > > >another one with the format
> > > You may try this:
> > > cat ./test.txt | awk '{print $1" "$2; print $1" "$3; print $1" "$4}' |
> > > grep -v ' $'
> >
> > $ awk '{for(i=2;i<=NF;i++)printf $1"\t"$i"\n"}' test.txt
> >
> > That's all.
> >
> > or, try this.
> >
> > $ awk '{for(i=2;i<=NF;i++)print $1, $i}' test.txt
> >
> > I think awk is the best solution for this problem.
>
> The following command does almost exactly what I want:
>
> cat ./filename_introduced_user.txt | awk '{print $1" "$2; print $1"
> "$3; print $1" "$4; print $1" "$5; print $1" "$6; print $1" "$7; print
> $1" "$8; print $1" "$9; print $1" "$10; print $1" "$11; print $1"
> "$12; print $1" "$13; print $1" "$14; print $1" "$15; print $1" "$16;
> print $1" "$17; print $1" "$18; print $1" "$19; print $1" "$20; print
> $1" "$21; print $1" "$22; print $1" "$23; print $1" "$24; print $1"
> "$25; print $1" "$26; print $1" "$27}' | grep -v ' $' >
> another_filename_introduced_user.txt
>
> I am wondering whether it is possible to write a script to do the same
> but for a number of columns introduced by the user.
>
> Thanks in advance,
If you want to adapt to the columns in the file, this
would work:
#!/bin/sh
while read LINE
do
set -- $LINE
N=$1
while shift
do
if [ -n "$1" ]
then
echo $N $1
fi
done
done
If you want to set a limit on the columns you could add a
counter on the loop doing the shift and pass a value in
on the command line.
Thanks, Les. I have meanwhile learned a bit of Ruby and I could do the
same with it.
Paul
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