Tags

• Tags can be used with grep and its variants, but they are often used with tools like sed:

sed 's/\([0-9][0-9]*\)/\1\.0/g' \

raw.grades > float.grades

will insert .0 after every string of digits in the raw.grades file.

• There are, as usual, other ways to do this in sed, including:

sed 's/[0-9][0-9]*/&\.0/g' \

raw.grades > float.grades

• I recommend you use the first style for now.