Sponsored Content
Full Discussion: range patterns in awk
Top Forums Shell Programming and Scripting range patterns in awk Post 302481917 by radoulov on Monday 20th of December 2010 07:30:48 AM
Old 12-20-2010
It would be easier if you post a representative sample of your data (i.e. similar to your real file) and the expected output.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

AWK: Multiple patterns per line

Hi there, We have been given a bit of coursework using awk on html pages. Without giving too much away and risking the wrath of the plagerism checks, I can say we need to deal with certain html elements. There may be several of these elements on one line. My question is, if there are more... (1 Reply)
Discussion started by: Plavixo
1 Replies

2. Shell Programming and Scripting

print range between two patterns if it contains a pattern within the range

I want to print between the range two patterns if a particular pattern is present in between the two patterns. I am new to Unix. Any help would be greatly appreciated. e.g. Pattern1 Bombay Calcutta Delhi Pattern2 Pattern1 Patna Madras Gwalior Delhi Pattern2 Pattern1... (2 Replies)
Discussion started by: joyan321
2 Replies

3. Shell Programming and Scripting

range in if using awk

Hi All, I would like to assign the following values to each column in my file. if $i is between 1 and -1 (ie -1 < $i < 1) then print A; if $i is between -2 and -1 && 1 and 2 (ie. -2 < $i < -1 && 1 < $i < 2) then print B; if $i is between -3 and -2 && 2 and 3 (ie. -3 < $i < -2 && 2 < $i < 3)... (1 Reply)
Discussion started by: Fredrick
1 Replies

4. Shell Programming and Scripting

[Solved] HP-UX awk sub multiple patterns

Hi, I am using sub to remove blank spaces and one pattern(=>) from the input string. It works fine when I am using two sub functions for the same. However it is giving error while I am trying to remove both spaces and pattern using one single sub function. Working: $ echo " OK => " |awk... (2 Replies)
Discussion started by: sai_2507
2 Replies

5. Shell Programming and Scripting

awk comparison with two patterns

Here is my list, which contains URLs for file downloads: //servername.com/version/panasonic1,1_1.1.1 //servername.com/version/panasonic3,1_6.7.1 //servername.com/version/panasonic3,2_6.8 //servername.com/version/panasonic2,6_3.0.2 //servername.com/version/panasonic3,1_7.1.3... (5 Replies)
Discussion started by: ibanezpete
5 Replies

6. Shell Programming and Scripting

Searching multiple patterns using awk

Hello, I have the following input file: qh1adm 20130710111201 : tp import all QH1 u6 -Dsourcesystems=BFI,EBJ qh1adm 20130711151154 : tp import all QH1 u6 -Dsourcesystems=BFI,EBJ qx1adm 20130711151154 : tp count QX1 u6 -Dsourcesystems=B17,E17,EE7 qh1adm 20130711151155 : tp import all... (7 Replies)
Discussion started by: kcboy
7 Replies

7. Shell Programming and Scripting

Specifying patterns to egrep or awk

given this information: ^\w{3} {11} -]+ kernel:( \]+\.]+\])? ]+: media error \(bad sector\): status=0x]+ { DriveReady SeekComplete Error }$ ^\w{3} {11} -]+ kernel:( \]+\.]+\])? end_request: I/O error, dev ]+, sector ]+ i need to set up monitoring for these strings. but as you can see, they... (2 Replies)
Discussion started by: SkySmart
2 Replies

8. Shell Programming and Scripting

awk search patterns from file in another

I would like to grep for aaa and bbb and ccc from one line in file1.txt in any order on a line on file2.txt file1.txt aaa bbb ccc ddd fff ggg hhh ddd jjj jjj cccfile2.txt aaa bbb ccc ddd fff ggg --> output whole line since it matches with aaa bbb ccc of file1.txt aaa ddd jjj hhh --> no... (1 Reply)
Discussion started by: sdf
1 Replies

9. UNIX for Beginners Questions & Answers

TCL script to print range of lines between patterns

Hi I am having a code as stated below module abcd( a , b , c ,da , fa, na , ta , ma , ra , ta, la , pa ); input a , b, da ,fa , na , ta , ma; output c , ra ,ta , la ,pa ; wire a , b , da , fa ,na , ta , ma; endmodule I need to match the string... (1 Reply)
Discussion started by: kshitij
1 Replies

10. UNIX for Beginners Questions & Answers

Match patterns between two files and extract certain range of strings

Hi, I need help to match patterns from between two different files and extract region of strings. inputfile1.fa >l-WR24-1:1 GCCGGCGTCGCGGTTGCTCGCGCTCTGGGCGCTGGCGGCTGTGGCTCTACCCGGCTCCGG GGCGGAGGGCGACGGCGGGTGGTGAGCGGCCCGGGAGGGGCCGGGCGGTGGGGTCACGTG... (4 Replies)
Discussion started by: bunny_merah19
4 Replies
A2P(1)							 Perl Programmers Reference Guide						    A2P(1)

NAME
a2p - Awk to Perl translator SYNOPSIS
a2p [options] [filename] DESCRIPTION
A2p takes an awk script specified on the command line (or from standard input) and produces a comparable perl script on the standard output. OPTIONS Options include: -D<number> sets debugging flags. -F<character> tells a2p that this awk script is always invoked with this -F switch. -n<fieldlist> specifies the names of the input fields if input does not have to be split into an array. If you were translating an awk script that processes the password file, you might say: a2p -7 -nlogin.password.uid.gid.gcos.shell.home Any delimiter can be used to separate the field names. -<number> causes a2p to assume that input will always have that many fields. -o tells a2p to use old awk behavior. The only current differences are: o Old awk always has a line loop, even if there are no line actions, whereas new awk does not. o In old awk, sprintf is extremely greedy about its arguments. For example, given the statement print sprintf(some_args), extra_args; old awk considers extra_args to be arguments to "sprintf"; new awk considers them arguments to "print". "Considerations" A2p cannot do as good a job translating as a human would, but it usually does pretty well. There are some areas where you may want to examine the perl script produced and tweak it some. Here are some of them, in no particular order. There is an awk idiom of putting int() around a string expression to force numeric interpretation, even though the argument is always integer anyway. This is generally unneeded in perl, but a2p can't tell if the argument is always going to be integer, so it leaves it in. You may wish to remove it. Perl differentiates numeric comparison from string comparison. Awk has one operator for both that decides at run time which comparison to do. A2p does not try to do a complete job of awk emulation at this point. Instead it guesses which one you want. It's almost always right, but it can be spoofed. All such guesses are marked with the comment ""#???"". You should go through and check them. You might want to run at least once with the -w switch to perl, which will warn you if you use == where you should have used eq. Perl does not attempt to emulate the behavior of awk in which nonexistent array elements spring into existence simply by being referenced. If somehow you are relying on this mechanism to create null entries for a subsequent for...in, they won't be there in perl. If a2p makes a split line that assigns to a list of variables that looks like (Fld1, Fld2, Fld3...) you may want to rerun a2p using the -n option mentioned above. This will let you name the fields throughout the script. If it splits to an array instead, the script is probably referring to the number of fields somewhere. The exit statement in awk doesn't necessarily exit; it goes to the END block if there is one. Awk scripts that do contortions within the END block to bypass the block under such circumstances can be simplified by removing the conditional in the END block and just exiting directly from the perl script. Perl has two kinds of array, numerically-indexed and associative. Perl associative arrays are called "hashes". Awk arrays are usually translated to hashes, but if you happen to know that the index is always going to be numeric you could change the {...} to [...]. Iteration over a hash is done using the keys() function, but iteration over an array is NOT. You might need to modify any loop that iterates over such an array. Awk starts by assuming OFMT has the value %.6g. Perl starts by assuming its equivalent, $#, to have the value %.20g. You'll want to set $# explicitly if you use the default value of OFMT. Near the top of the line loop will be the split operation that is implicit in the awk script. There are times when you can move this down past some conditionals that test the entire record so that the split is not done as often. For aesthetic reasons you may wish to change index variables from being 1-based (awk style) to 0-based (Perl style). Be sure to change all operations the variable is involved in to match. Cute comments that say "# Here is a workaround because awk is dumb" are passed through unmodified. Awk scripts are often embedded in a shell script that pipes stuff into and out of awk. Often the shell script wrapper can be incorporated into the perl script, since perl can start up pipes into and out of itself, and can do other things that awk can't do by itself. Scripts that refer to the special variables RSTART and RLENGTH can often be simplified by referring to the variables $`, $& and $', as long as they are within the scope of the pattern match that sets them. The produced perl script may have subroutines defined to deal with awk's semantics regarding getline and print. Since a2p usually picks correctness over efficiency. it is almost always possible to rewrite such code to be more efficient by discarding the semantic sugar. For efficiency, you may wish to remove the keyword from any return statement that is the last statement executed in a subroutine. A2p catches the most common case, but doesn't analyze embedded blocks for subtler cases. ARGV[0] translates to $ARGV0, but ARGV[n] translates to $ARGV[$n-1]. A loop that tries to iterate over ARGV[0] won't find it. ENVIRONMENT
A2p uses no environment variables. AUTHOR
Larry Wall <larry@wall.org> FILES
SEE ALSO
perl The perl compiler/interpreter s2p sed to perl translator DIAGNOSTICS
BUGS
It would be possible to emulate awk's behavior in selecting string versus numeric operations at run time by inspection of the operands, but it would be gross and inefficient. Besides, a2p almost always guesses right. Storage for the awk syntax tree is currently static, and can run out. perl v5.16.2 2012-08-26 A2P(1)
All times are GMT -4. The time now is 04:33 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy