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Shell Programming and Scripting

Extract lines from text files

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Top Forums Shell Programming and Scripting Extract lines from text files
# 8  
Old 01-26-2014
Combining all the inputs of the posters in this thread, we would end up with something like this:
Code:
awk '$8>=-99 && $8<=-67 && $9>=100 && $9<=165 || NR==1' file

Note that the 2nd line in your output specification is out of range (>165).

----
*edit I see Akshay has already posted the same suggestion
# 9  
Old 01-26-2014
Hi scrutinizer,

Thank you. I have corrected it.
# 10  
Old 01-26-2014
Hi Edweena,
I repeat: The specification that PHI must be in the range "-67<=phi<=-99" means that there must be no output. There is no value of phi that is both greater than -67 and less than -99! The following code looks for PHI to be in the range -99<=PHI<=-67 and produces the output you requested. It reads from files in directory f1 and writes files into directory f2 with the final component of both paths being the same filename.

Code:
awk -v dest_dir=f2 '
FNR == 1 || ($8 >= -99 && $8 <= -67 && $9 >= 100 && $9 <= 165) {
        if(FNR == 1 && file != "")
                # Close previous output file.
                close(file)
        if(FNR == 1) {
                # Set output pathname for current file.
                # Start with input pathname.
                file = FILENAME
                # Strip off directories.
                sub(/.*\//, "", file)
                # Add destination directory.
                file = dest_dir "/" file
        }
        if(FNR != 1) # Delete this line to add header line to output files.
                print > file
}' f1/*

If you want to try this on a Solaris/SunOS system, use /usr/xg4/bin/awk, /usr/xpg6/bin/awk, or nawk instead of /usr/bin/awk.
# 11  
Old 01-31-2014
Hi Don Cragun,

Thank you very much for your help.
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