Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Select only certain lines from file and mantain formatting
Top Forums UNIX for Dummies Questions & Answers Select only certain lines from file and mantain formatting Post 302252944 by joeyg on Thursday 30th of October 2008 04:38:51 PM
Old 10-30-2008
Hammer & Screwdriver
Code:
> sed "s/^STM/~STM/" file21 | tr "\n" "|" | tr "~" "\n" | cut -d"|" -f1,4

sed "s/^STM/~STM/" file21
   sed is an editor, file21 is my input
   I sustitute STM, where the ^ says at beginning of line
   with ~STM, so I can grab at that ~ later

|
   that is often called a pipe, and is not an l or L
   takes one result, and pipe's to next set of commands

tr "\n" "|"
   translate new-line characters to a | character
   I will want to use this as a delimiter or marker later

tr "~" "\n"
   translate the ~ to a new-line
   this effectively puts each instance on one line (was 4-5 lines at start)

cut -d"|" -f1,4
   using the | as a delimiter, as I put there earlier
   grab the 1st and 4th fields

Try the command yourself, just doing the first part. Then do again including the second part, and you will start to understand how data can be managed.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

formatting the sql select result

Hi, I have about 12 columns and 15 rows to be retrived from sybase isql command through unix. But when i output the sql into a file and see it, the formatting is going for a toss. can someone please suggest how can i get the result correctly in the output file ? Thanks, Sateesh (2 Replies)
Discussion started by: kotasateesh
2 Replies

2. Shell Programming and Scripting

Select some lines from a txt file and create a new file with awk

Hi there, I have a text file with several colums separated by "|;#" I need to search the file extracting all columns starting with the value of "1" or "2" saving in a separate file just the first 7 columns of each row maching the criteria, with replacement of the saparators in the nearly created... (4 Replies)
Discussion started by: capnino
4 Replies

3. Shell Programming and Scripting

Select lines in which column have value greater than some percent of total file lines

i have a file in following format 1 32 3 4 6 4 4 45 1 45 4 61 54 66 4 5 65 51 56 65 1 12 32 85 now here the total number of lines are 8(they vary each time) Now i want to select only those lines in which the values... (6 Replies)
Discussion started by: vaibhavkorde
6 Replies

4. Shell Programming and Scripting

sql select command output formatting in shell script

Hi, I need to connect to the database and retrieve two variables from the database and store them in a variable,out of these two variables I need to get lastdigit appended to the variable 1 retrieved and variable 2 with out any modification in short select var,data from usage; o/p=... (1 Reply)
Discussion started by: rkrish
1 Replies

5. UNIX for Dummies Questions & Answers

how to select lines from one file based on another file

Hi, I would like to know how can I select lines of one file based on a common ID column from another file (keeping the order of the second file). Example of file1: ID A B C D 1-30 1 2 3 5-60 4 5 6 1-20 7 8 9 Example of file2: ID chr pos 1-20 1 20 1-30 1 30 5-60 5 60 Desired... (2 Replies)
Discussion started by: fadista
2 Replies

6. UNIX for Dummies Questions & Answers

How to randomly select lines from a text file

I have a text file with 1000 lines, I want to randomly select 200 lines from it and print them as output. How do I go about doing that? Thanks! (7 Replies)
Discussion started by: evelibertine
7 Replies

7. Shell Programming and Scripting

Short program to select lines from a file based on a second file

Hello, I use UBUNTU 12.04. I want to write a short program using awk to select some lines in a file based on a second file. My first file has this format with about 400,000 lines and 47 fields: SNP1 1 12.1 SNP2 1 13.2 SNP3 1 45.2 SNP4 1 23.4 My second file has this format: SNP2 SNP3... (1 Reply)
Discussion started by: Homa
1 Replies

8. Shell Programming and Scripting

Select lines from a file based on a criteria

Hi I need to select lines from a txt file, I have got a line starting with ZMIO:MSISDN= and after a few line I have another line starting with 'MOBILE STATION ISDN NUMBER' and another one starting with 'VLR-ADDRESS' I need to copy these three lines as three different columns in a separate... (3 Replies)
Discussion started by: Tlcm sam
3 Replies

9. Shell Programming and Scripting

awk - mixed for and if to select particular lines in a data file

Hi all, I am new to AWK and I am trying to solve a problem that is probably easy for an expert. Suppose I have the following data file input.txt: 20 35 43 20 23 54 20 62 21 20.5 43 12 20.5 33 11 20.5 89 87 21 33 20 21 22 21 21 56 87 I want to select from all lines having the... (4 Replies)
Discussion started by: naska
4 Replies

10. Shell Programming and Scripting

Select only the lines of a file starting with a field which is matcing a list. awk?

Hello I have a large file1 which has many events like "2014010420" and following lines under each event that start with text . It has this form: 2014010420 num --- --- num .... NTE num num --- num... EFA num num --- num ... LASW num num --- num... (9 Replies)
Discussion started by: phaethon
9 Replies

LEARN ABOUT NETBSD

cut

CUT(1)							    BSD General Commands Manual 						    CUT(1)

NAME

     cut -- select portions of each line of a file

SYNOPSIS

     cut -b list [-n] [file ...]
     cut -c list [file ...]
     cut -f list [-d delim] [-s] [file ...]

DESCRIPTION

     The cut utility selects portions of each line (as specified by list) from each file and writes them to the standard output.  If the file
     argument is a single dash ('-') or no file arguments were specified, lines are read from the standard input.  The items specified by list can
     be in terms of column position or in terms of fields delimited by a special character.  Column numbering starts from 1.

     list is a comma or whitespace separated set of increasing numbers and/or number ranges.  Number ranges consist of a number, a dash (-), and a
     second number and select the fields or columns from the first number to the second, inclusive.  Numbers or number ranges may be preceded by a
     dash, which selects all fields or columns from 1 to the first number.  Numbers or number ranges may be followed by a dash, which selects all
     fields or columns from the last number to the end of the line.  Numbers and number ranges may be repeated, overlapping, and in any order.	It
     is not an error to select fields or columns not present in the input line.

     The options are as follows:

     -b list	 The list specifies byte positions.

     -c list	 The list specifies character positions.

     -d string	 Use the first character of string as the field delimiter character.  The default is the <TAB> character.

     -f list	 The list specifies fields, separated by the field delimiter character.  The selected fields are output, separated by the field
		 delimiter character.

     -n 	 Do not split multi-byte characters.

     -s 	 Suppresses lines with no field delimiter characters.  Unless specified, lines with no delimiters are passed through unmodified.

EXIT STATUS

     cut exits 0 on success, 1 if an error occurred.

SEE ALSO

     paste(1)

STANDARDS

     The cut utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').

BSD
								 December 21, 2008							       BSD
All times are GMT -4. The time now is 02:53 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy