Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Compare - 1st col of file
Top Forums Shell Programming and Scripting Compare - 1st col of file Post 302353498 by gch on Tuesday 15th of September 2009 12:41:54 PM
Old 09-15-2009
Quote:
Originally Posted by ripat
Linux and ksh. But in this case I don't think that the type of shell is relevant as all solutions are using external programs. I ran that test on large files as one can assume that the OP was just giving a sample and will be working on larger files.
You are right. How big were your files? Only OS and system load would make difference. I want to try it on Solaris 10. In the case of large files, there would be a threshold at which awk could gain advantage. It all depends on how these utilities are written. The multiple commands have smaller memory footprint but use multiple redirections (waiting for I/O).
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

compare two col from 2 files, and output uniq from file 1

Hi, I can't find how to achive such thing, please help. I have try with uniq and comm but those command can't compare columns just whole lines, I think awk will be the best but awk is magic for me as of now. file a a1~a2~a3~a4~a6~a7~a8 file b b1~b2~b3~b4~b6~b7~b8 output 1: compare... (2 Replies)
Discussion started by: pp56825
2 Replies

2. Shell Programming and Scripting

compare two files and make 1st file same as 2nd file

I am trying to compare two file and make changes where ever its different. for example: Contents of file1 IP=192.165.89.11 NM=255.255.0.0 GW=192.165.89.1 Contents of file2 IP=192.165.89.11 NM=255.255.255.255 GW=192.165.89.1 NOTE HERE THAT NM IS DIFFERENT So i want the changes... (6 Replies)
Discussion started by: pradeepreddy
6 Replies

3. Ubuntu

Match col 1 of File 1 with col 1 File 2 and create a 3rd file

Hello, I have a 1.6 GB file that I would like to modify by matching some ids in col1 with the ids in col 1 of file2.txt and save the results into a 3rd file. For example: File 1 has 1411 rows, I ignore how many columns it has (thousands) File 2 has 311 rows, 1 column Would like to... (7 Replies)
Discussion started by: sogi
7 Replies

4. Shell Programming and Scripting

Get columns from another file for match in col 2 in 1st file

Hi, My first file has 592155 9 rs16916098 1 592156 19 rs7249604 1 592157 4 rs885156 1 592158 5 rs350067 12nd file has 9 rs16916098 0 113228129 2 4 19 rs7249604 0 58709070 4 2 2 rs17042833 0 113558750 4 2... (2 Replies)
Discussion started by: genehunter
2 Replies

5. Shell Programming and Scripting

how to add new col in a file

Hi, Experts, I have a requirement as following: my source file: a a a b b c c c c I need add one more colume as following: 1 a 2 a 3 a 1 b 2 b 1 c 2 c (4 Replies)
Discussion started by: ken002
4 Replies

6. UNIX for Advanced & Expert Users

Print line based on highest value of col (B) and repetion of values in col (A)

Hello everyone, I am writing a script to process data from the ATP world tour. I have a file which contains: t=540 y=2011 r=1 p=N409 t=540 y=2011 r=2 p=N409 t=540 y=2011 r=3 p=N409 t=540 y=2011 r=4 p=N409 t=520 y=2011 r=1 p=N409 t=520 y=2011 r=2 p=N409 t=520 y=2011 r=3 p=N409 The... (4 Replies)
Discussion started by: imahmoud
4 Replies

7. Shell Programming and Scripting

Printing from col x to end of line, except last col

Hello, I have some tab delimited data and I need to move the last col. I could hard code it, awk '{ print $1,$NF,$2,$3,$4,etc }' infile > outfile but it would be nice to know the syntax to print a range cols. I know in cut you can do, cut -f 1,4-8,11- to print fields 1,... (8 Replies)
Discussion started by: LMHmedchem
8 Replies

8. Shell Programming and Scripting

Run a program-print parameters to output file-replace op file contents with max 4th col

Hi Friends, This is the only solution to my task. So, any help is highly appreciated. I have a file cat input1.bed chr1 100 200 abc chr1 120 300 def chr1 145 226 ghi chr2 567 600 unix Now, I have another file by name input2.bed (This file is a binary file not readable by the... (7 Replies)
Discussion started by: jacobs.smith
7 Replies

9. Shell Programming and Scripting

Modifying col values based on another col

Hi, Please help with this. I have several excel files (with and .xlsx format) with 10-15 columns each. They all have the same type of data but the columns are not ordered in the same way. Here is a 3 column example. What I want to do add the alphabet from column 2 to column 3, provided... (9 Replies)
Discussion started by: newbie83
9 Replies

10. UNIX for Beginners Questions & Answers

Compare 1st column from 2 file and if match print line from 1st file and append column 7 from 2nd

hi I have 2 file with more than 10 columns for both 1st file apple,0,0,0...... orange,1,2,3..... mango,2,4,5..... 2nd file apple,2,3,4,5,6,7... orange,2,3,4,5,6,8... watermerlon,2,3,4,5,6,abc... mango,5,6,7,4,6,def.... (1 Reply)
Discussion started by: tententen
1 Replies

LEARN ABOUT DEBIAN

fitscheck

fitscheck(1)							   PyFITS 3.0.7 						      fitscheck(1)

NAME

       fitscheck - script to detect and fix FITS standards violations

SYNOPSIS

       fitscheck [OPTION]... [FILE]...

DESCRIPTION

       fitscheck  is  a  command line script based on pyfits for verifying and updating the CHECKSUM and DATASUM keywords of FITS files.  itscheck
       can also detect and often fix other FITS standards violations. fitscheck facilitates re-writing the non-standard checksums originally  gen-
       erated by pyfits with standard checksums which will interoperate with cfitsio.

       fitscheck will refuse to write new checksums if the checksum keywords are missing or their values are bad.  Use --force to write new check-
       sums regardless of whether or not they currently exist or pass.	Use --ignore-missing to tolerate missing checksum  keywords  without  com-
       ment.

OPTIONS

       -h, --help
	      Display terse usage information (help).

       -k [standard | nonstandard | either | none], --checksum=[standard | nonstandard | either | none]
	      Choose FITS checksum mode or none. Defaults to standard.

       -w, --write
	      Write out file checksums and/or FITS compliance fixes.

       -f, --force
	      Do file update even if original checksum was bad.

       -c, --compliance
	      Do FITS compliance checking, fix if possible.

       -i, --ignore-missing
	      Ignore missing checksums.

       -v, --verbose
	      Generate extra output.

EXAMPLES

       % fitscheck --checksum either --write *.fits
       Verify and update checksums, tolerating non-standard checksums, updating to standard checksum.

       % fitscheck --write --force *.fits
       Write new checksums, even if existing checksums are bad or missing.

       % fitscheck --compliance *.fits
       Verify standard checksums and FITS compliance without changing the files.

       % fitscheck --checksum nonstandard *.fits
       Verify original nonstandard checksums only.

       % fitscheck --checksum none --compliance --write *.fits
       Only check and fix compliance problems,	ignoring checksums.

       % fitscheck *.fits
       Verify standard interoperable checksums.

       % fitscheck --checksum none --write *.fits
       Delete checksum keywords.

fitscheck							     June 2012							      fitscheck(1)
All times are GMT -4. The time now is 08:21 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy