Please help. Complicated text file manipulation problem


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Please help. Complicated text file manipulation problem
# 8  
Old 09-23-2011
awk is more suited for doing something like this...
# 9  
Old 09-23-2011
To replace the character at row,col with newchar, try

Code:
sed "${row} s/./${newchar}/${col}" <inputfile >outputfile

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Text File Manipulation

Hello, Supposing I had a huge list as follows: TAC manufacturer Device Type 1392600 LG D959 LG-D959TS FeaturePhone 1409700 LG V410 FeaturePhone 35150806 LG F350S FeaturePhone 35165206 Samsung GT-E1200 FeaturePhone 35194505 Nokia Asha 200 FeaturePhone but I want to make it look like... (3 Replies)
Discussion started by: Cludgie
3 Replies

2. Shell Programming and Scripting

Text file manipulation

Hi Gurus, I have a question I have a flat file like below with three fields (3 rd field is amt) ad|B|500 cc||100 dd|C|600 ee||900 Need to write a code in such a way that when second field is empty then do sum of third field So in this case it will be 100 +900 I tried but no luck... (1 Reply)
Discussion started by: patricjemmy6
1 Replies

3. Programming

String Manipulation in a text file

Hi I have a requirement to write a script but not sure which is the best way to approach this I have not worked in sed but I'm aware that its robust for file extraction requirements I have a scripting task. I already developed the code in perl but the script is taking almost 2 mins for... (5 Replies)
Discussion started by: John Trevor
5 Replies

4. Shell Programming and Scripting

Difficult problem: Complex text file manipulation in bash script.

I don't know if this is a big issue or not, but I'm having difficulties. I apoligize for the upcoming essay :o. I'm writing a script, similar to a paint program that edits images, but in the form of ANSI block characters. The program so far is working. I managed to save the image into a file,... (14 Replies)
Discussion started by: tinman47
14 Replies

5. UNIX for Dummies Questions & Answers

Text File Manipulation Help

Hi I've two text files FILE_1 and FILE_2 as shown below: FILE_1.txt CO Contig1 342 12 11 U GGGCTGACGTGGCCGCTAATACGACTCACTATAGGG*AGAGAAGTCATTTTCTTGTTTAG BQ 35 35 35 50 50 50 50 50 50 50 50 60 65 65 65 65 65 65 65 65 65 65 65 65 50 AF GP5UOVN01AOPE0 U 1 AF GP5UOVN01AT8W3 U 1 ... (1 Reply)
Discussion started by: Fahmida
1 Replies

6. Shell Programming and Scripting

Text File Manipulation

Hi, I need to write shell script for the scenario explained below - datafile.txt AcctNum,code,Region,,,, 12345451,AN ,abaab 12345452,AN ,xccxc 76677545,RP ,acxcc 43567878,RP ,afghh 32190900,AN ,afrfrf 87312345,AN ,aqaw I have a text file (datafile.txt)... (1 Reply)
Discussion started by: ravigupta2u
1 Replies

7. Shell Programming and Scripting

File text manipulation

What I am trying to do is make a script that will add a port number within a section of a file if it already doesn't exist in that section of the file. The particular line that I would like to add the port number to in the file is formatted like this: TCPPORTS="25 80 125 443 8080 10000" For... (3 Replies)
Discussion started by: nullifx
3 Replies

8. Shell Programming and Scripting

Complicated(?) text file comparison

I've got two files, both plain text. Each file is a datafeed of products, pipe delimited. The current file is in directory 1 and yesterday's file is in directory 2 (literally, those are the directory names). What I'm trying to do is compare the files and pull out products whose price has changed... (3 Replies)
Discussion started by: Daniel M. Clark
3 Replies

9. UNIX for Dummies Questions & Answers

Text file manipulation

I am a new unix user & I wanted to work with unix as it is very good in text manipulations. I need a little help. I will be grateful if someone can help me out. I need help in grepping a pattern of numbers from one file to another file. Specific details are as follows: File one contains only... (4 Replies)
Discussion started by: Ezy
4 Replies

10. UNIX for Dummies Questions & Answers

Text file manipulation

Hi, I need to remove lines from a text file that are less than certain length in UNIX. For example, test.txt file contains the following lines: abcdefghijklmnopqrstuvwxyz. 123456789009876543211234567 This line to be removed. zyxwvutsrqponmlkjihgfedcba. The length of each line is supposed... (5 Replies)
Discussion started by: svannala
5 Replies
Login or Register to Ask a Question