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Homework and Emergencies Emergency UNIX and Linux Support Urgent help pls.how to extract two lines having same starting number Post 302433933 by lifeline on Thursday 1st of July 2010 02:08:35 AM
Old 07-01-2010
Error

Code:
set -A array $(</tmp/inputfile) #reading file in array

c= ${#array[*]} #the no. of elements in the array
 
i=1
 
while [ $i -lt $c ]
do
   j=`expr $i +1`
   v1=`echo ${array[$i]}|cut -d" " -f1`
   v2=`echo ${array[$j]}|cut -d" " -f1`
   
   if [ $v1 = $v2 ]
       then
             array[$i]=`echo F.${array[$i]}`
   fi
   i=`expr $i +1`
done
 
i=1
 
while [ $i -le $c ]
do
   x=`echo ${array[$i]|cut -c1`
   
   if [ $x -ne "F" ]
     then
           `echo ${array[$i]}>>newfile`
   fi
done
 
`cat newfile`

see if the code given above works.

here i am trying to store each lines of the inputfile in an array.
c is the number of array elements. (or the numbert of lines in the input file.)
i am checkimg of the two consecutive fileds have same value. if true i am setting F as the 1st character in the 1st of the two lines. then store the same in the array.

later in another loop i am checking if the 1st character of any line is not F (this marks that this line has not been repeated). if true i am writing that to newfile.

newfile is the reqd ouput file.

Last edited by Scott; 07-01-2010 at 07:45 AM.. Reason: Added code tags
 

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diffmk(1)							   User Commands							 diffmk(1)

NAME
diffmk - mark differences between versions of a troff input file SYNOPSIS
diffmk oldfile newfile markedfile DESCRIPTION
diffmk compares two versions of a file and creates a third version that includes "change mark" (.mc) commands for nroff(1) and troff(1). oldfile and newfile are the old and new versions of the file. diffmk generates markedfile, which, contains the text from newfile with troff(1) "change mark" requests (.mc) inserted where newfile differs from oldfile. When markedfile is formatted, changed or inserted text is shown by | at the right margin of each line. The position of deleted text is shown by a single *. USAGE
See largefile(5) for the description of the behavior of diffmk when encountering files greater than or equal to 2 Gbyte ( 2^31 bytes). EXAMPLES
Example 1 An example of the diffmk command. diffmk can also be used in conjunction with the proper troff requests to produce program listings with marked changes. In the following command line: example% diffmk old.c new.c marked.c ; nroff reqs marked.c | pr the file reqs contains the following troff requests: .pl 1 .ll 77 .nf .eo .nh which eliminate page breaks, adjust the line length, set no-fill mode, ignore escape characters, and turn off hyphenation, respectively. If the characters | and * are inappropriate, you might run markedfile through sed(1) to globally change them. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWdoc | +-----------------------------+-----------------------------+ SEE ALSO
diff(1), nroff(1), sed(1), troff(1), attributes(5), largefile(5) BUGS
Aesthetic considerations may dictate manual adjustment of some output. File differences involving only formatting requests may produce undesirable output, that is, replacing .sp by .sp 2 will produce a "change mark" on the preceding or following line of output. SunOS 5.11 14 Sep 1992 diffmk(1)
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