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Top Forums Shell Programming and Scripting Need shell script to read two file at same time and print out in single file Post 302295395 by mjd_tech on Saturday 7th of March 2009 10:11:18 PM
Old 03-07-2009
There are probably a million better ways to do this...
but here goes...
Code:
#!/bin/sh
linecount1=$(wc -l file1.txt | cut -d\  -f 1 )
linecount2=$(wc -l file2.txt | cut -d\  -f 1 )
i=1 j=1
while [ $i -le $linecount1 -a $j -le $linecount2 ]; do
    sed -n -e "${i}p" file1.txt >> output.txt
    sed -n -e "${j}p" file2.txt >> output.txt
    echo "-----" >> output.txt
    i=$(( i + 1 )); j=$(( j + 1))
done

I had to do the cut stuff when assigning linecount, because my wc -l prints the file name after the number of lines. (Debian)

Regards,
MD
 

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X2SYS_MERGE(1gmt)					       Generic Mapping Tools						 X2SYS_MERGE(1gmt)

NAME
x2sys_merge - Merge an updated COEs tables SYNOPSIS
x2sys_merge -Amain_COElist.d -Mnew_COElist.d DESCRIPTION
x2sys_merge will read two crossovers data base and output the contents of the main one updated with the COEs in the second one. The second file should only contain updated COEs relatively to the first one. That is, it MUST NOT contain any new two tracks intersections (This point is NOT checked in the code). This program is useful when, for any good reason like file editing NAV correction or whatever, one had to recompute only the COEs between the edited files and the rest of the database. -A Specify the file main_COElist.d with the main crossover error data base. -M Specify the file new_COElist.d with the newly computed crossover error data base. OPTIONS
No space between the option flag and the associated arguments. EXAMPLES To update the main COE_data.txt with the new COEs estimations saved in the smaller COE_fresh.txt, try x2sys_merge -ACOE_data.txt -MCOE_fresh.txt > COE_updated.txt SEE ALSO
x2sys_binlist(1), x2sys_cross(1), x2sys_datalist(1), x2sys_get(1), x2sys_init(1), x2sys_list(1), x2sys_put(1), x2sys_report(1) GMT 4.5.7 15 Jul 2011 X2SYS_MERGE(1gmt)
All times are GMT -4. The time now is 08:02 PM.
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