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Full Discussion: awk , conditional involving line and column
Top Forums Shell Programming and Scripting awk , conditional involving line and column Post 302602071 by agama on Saturday 25th of February 2012 10:17:16 PM
Old 02-25-2012
I think this will do what you want. Reads data1.txt and generates data2.txt and data3.txt. I was a bit confused with your example of data3 -- I assumed you meant that it should have anything not written to data2.txt.

Code:
awk '
    NR == 1 { print >"data2.txt"; print >"data3.txt"; next; }   # needed if there is a header line
    {
        if( $1 == "Si"  &&  $2+0 > simax )
            simax = $2 + 0      # take note of max value 

        capture[++idx] = $0;   # capture for output lines
        type[idx] = $1;            # save type and value for easy check at end
        value[idx] = $2+0;
    }

    END {
        for( i = 1; i <= idx; i++ )     # for each input line we saw put it someplace based on the z value 
        {
            dest = ((type[i] == "O" || type[i] == "H") && value[i] > simax ) ? "data2.txt" : "data3.txt";
            print capture[i] >dest;
        }
    }
' data1.txt

Last edited by agama; 02-26-2012 at 03:33 PM.. Reason: Realised your input has a header, didn't deal with that initially; consistency change on assignment of value.
 

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LEARN ABOUT DEBIAN

x2sys_merge

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 02:56 AM.
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