Adding a columnfrom a specifit line number to a specific line number - Shell Programming and Scripting

Ezy · #1 (**permalink**) 05-12-2008

Hi,

I have a huge file & I want to add a specific text in column. But I want to add this text from a specific line number to a specific line number & another text in to another range of line numbers.

To be more specific: lets say my file has 1000 lines & 4 Columns. I want to add text "Hello" to 5th column but from line 1 to line 200. & I want to add another text "goodbye" to 5th column of the same file from line 201 to 800 & another text "live" again to 5th column to the same file from line 801 to 1000.

I know I can use sed to add a column to my file but I don't know how to tell sed to add this column to from line & to to line.

Code:

$ sed 's/\(.*\) \(.*\) \(.*\) \/\1 \2 \3 \  Desired string/' input > output

this will add my desired string to the 4th column in the right place but I don't know how to limit this to a specific range of lines.

May be there is a way to do it in sed or may be awk?

Any help will be very welcome.

Thanks in advance,
Ezy

aju_kup · #2 (**permalink**) 05-12-2008

Code:

awk ' NR >=1 && NR <= 200 { print $0 " Hello" }
        NR >=201 && NR <=800 { print $0 " Goodbye"}
        NR >=801 && NR <=1000 { print $0 " live"}' <filename>

Ezy · #3 (**permalink**) 05-12-2008

Oh thanks a lot....this works perfectly fine & it seems fast enough to work with huge files.

Thanks a lot

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
Appending line number to each line and getting total number of lines	chiru_h	Shell Programming and Scripting	2	03-25-2008 06:19 AM
extract a line from a file using the line number	grandtheftander	Shell Programming and Scripting	6	02-06-2008 02:12 AM
Appending the line number and a seperator to each line of a file ?	pjcwhite	Shell Programming and Scripting	4	03-20-2007 09:29 PM
Unix Script with line number at beginning of each line.	mascorro	Shell Programming and Scripting	5	06-19-2006 01:34 PM
identifying duplicates line & reporting their line number	stresslog	UNIX for Dummies Questions & Answers	5	04-23-2006 09:43 PM

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode