I have a file with lines such as:
....
pattern1 100 200 300
pattern2 300 400 400
pattern1 300 900 700
pattern1 200 500 900
...
As shown in the above example, there are some lines where pattern2
follows pattern1
but not all. I would like to match pattern1
then check if the next line has pattern2
and if it does, alter the next number field by multiplying it with a constant factor. I tried using getline
with awk
but it erases the lines with pattern1
from the resulting output:
awk '/pattern1/{getline; if($1==pattern2) $(NF-2)*=0.889848406214}1' infile.dat
Any suggestions how can I accomplish this without altering anything else in the input file.
Best Answer