使用awk和grep进行累加

Question

If I had a file that looks like this:

23.00   33.44 abcd 44.44  abcd12345abcd
33.00   22.22 qt   44.00  zlkm12345ksda

...and I wanted to add up the first column whenever I encounter 12345 in the middle of the pattern in the fifth column, how would I go about doing that?

Answer 1

Something like this?

awk '$5 ~ /12345/ { TOT = TOT + $1 } END { print TOT + 0 }' yourFile.txt

(Not at a computer, so my syntax might be a bit off.)

The first bit selects the lines you want and updates the total while the END bit just prints what's accumulated.

No grep needed (for almost all intents and purposes, awk is just as good if not better), and the search is limited to just the column you want searched.