How to add another column
Solution 1:
I'd use sed:
sed -i -E 's/([^ ]+)/\1 0/g' file
or if the file is tab-delimited:
sed -i -E 's/([^\t]+)/\1\t0/g' file
-
-iedit file inplace. -
s/pattern/replacement/means substitute pattern with a replacement string.
OR awk
awk -i inplace '{for (f=1;f<=NF; f++){$f=$f" 0"}}1' file
or
awk -i inplace '{for (f=1;f<=NF; f++){$f=$f"\t0"}}1' file
However, most implementations do not support -i inplace. Then, you need to write your output to a temp file and overwrite the original file with that:
awk '{for (f=1;f<=NF; f++){$f=$f" 0"}}1' file > file.tmp && mv file.tmp file
Solution 2:
A Perl approach:
$ perl -ane 'print "$_ 0 " for @F; print "\n"' file
0.0000000000 0 0.0000000000 0 0.0000000000 0
0.7804643317 0 0.5703578412 0 0.0000000000 0
-0.7804643317 0 0.5703578412 0 0.0000000000 0
Or, to edit the original file:
perl -i -ane 'print "$_ 0 " for @F; print "\n"' file