mjhjmtu

I am processing multiple file which are saved as

N.YMDH.U.A.1.SAC 
N.YMDH.U.D.2.SAC 
N.YMDH.U.E.3.SAC 

and so on...

I also have a .txt file which looks as follows named YMDH_arrival_time.txt

N.YMDH.U.A.1.SAC 5.000 7.000 
N.YMDH.U.D.2.SAC 7.321 4.313 
N.YMDH.U.E.3.SAC 3.243 7.876 

and so on ....

I want to write a script so, if the file name matches $1, then, do a command on the file which involves the input of $2 of the same row.

What I've been attempting

#### I want the $file to be read 1 by 1 so temp_file.txt is only 1 row long then the same file is read later and the value from the .txt file can be added then the process repeated ect.

for file in /Documents/Scaling/YMDH/*.SAC do;

awk '{$1 ~ /$file/ print $1 $2 $3' /Documents/Scaling/YMDH_arrival_time.txt > temp_file.txt 

#### in hope to find the row which matches and print that row into a new txt file

SAC <<EOF 

r $file 
CHNDHR T (I want to put the value of $2 of temp_file.txt here) 
w $file.done 
quit 
EOF 
done

any help will be appreciated or an alternate method. Thanks

If your YMDH_arrival_time.txt file has fixed format <string> <number> <number> - it's enough to use the following grep + cat approach:

grep -f <(cat /Documents/Scaling/YMDH/*.SAC) YMDH_arrival_time.txt > temp_file.txt

To fit your existing approach you'd just use

variable=$(cat temp_file.txt)

However check comments on RomanPerekhrest's approach.