?
Solved

delete all negative numbers in a file using shell or perl

Posted on 2011-09-02
5
Medium Priority
?
282 Views
Last Modified: 2012-05-12
ok. I have a file like below. I want to keep all rows and columns just eliminate the values that are negative. Also, the values may sometimes be rounded to the nearest hundreth (i.e. 00.00 format) instead of just whole numbers.

02-03-2011 00:00:00 13 16 19 22 21 14 12 10 11 15 14 23 25 24 23 17 20 26 23 27 26 23 15 10
02-04-2011 00:00:00 12 18 18 14 19 4 6 6 6 8 10 12 19 17 12 7 3 3 2 0 3 3 1 1
02-05-2011 00:00:00 3 3 5 11 8 19 5 5 4 5 6 7 7 5 6 4 0 -2 -1 0 1 0 0 3
02-06-2011 00:00:00 4 4 6 4 2 2 3 3 0 0 6 8 4 5 4 3 3 0 -4 -4 1 3 3 5
02-07-2011 00:00:00 4 1 2 3 3 2 4 7 8 11 13 20 36 12 13 19 24 21 22 13 16 19 16 17
02-08-2011 00:00:00 17 15 23 27 24 19 21 13 28 22 25 25 22 23 17 4 2 3 6 21 8 10 11 12
02-09-2011 00:00:00 20 17 14 13 13 12 9 9 11 16 14 22 15 14 15 17
02-10-2011 00:00:00 15 15 22 18 13 17 9 9 9 10 7 5 7 8 8 19
02-11-2011 00:00:00 17 22 25 29 24 22 21 22 32 22 32 22 15 21 26 14 9 9 14 15 21 19 14 20
02-12-2011 00:00:00 32 30 29 24 18 23 17 14 28 27 23 31 28 27 23 23 21 19 23 21 21 28 30 28
02-13-2011 00:00:00 31 35 32 15 13 8 8 9 7 26 25 21 24 6 3 2 10 23 33 17 7 23 21 24
02-14-2011 00:00:00 23 28 28 1 0 -1 1 2 4 4 9 14 14 23 29 13 10 10 9 33 12 20 14 26
02-15-2011 00:00:00 24 17 4 8 17 11 12 12 9 9 10 10 9 7 5 4 6 5 8 16 12 22 20 19
02-16-2011 00:00:00 21 18 19 9 10 10 10 12 11 8 4 9 10 6 0 -1 -3 -3 1 2 1 -1
02-17-2011 00:00:00 0 0 0 3 2 4 9 11 12 11 12 18 19 13 10 9 17 9 12 14 13 11 11 14
02-18-2011 00:00:00 11 10 10 8 7 8 8 5 9 10 4 3 7 8 9 10 8 6 7 11 9 7 8 6
02-19-2011 00:00:00 7 10 11 13 13 13 13 11 16 17 13 22 17 16 6 8 10 11 12 13 9 6 5 2
02-20-2011 00:00:00 5 9 10 11 10 10 8 8 12 12 15 19 17 17 14 13 14 14 13 19 19 15 18 18
02-21-2011 00:00:00 12 13 6 6 11 12 18 14 15 17 27 23 18 13 9 5 2 3 4 6 9 5 4 7
02-22-2011 00:00:00 7 9 8 5 5 4 6 8 8 4 6 15 16 17 16 14 14 13 13 14 11 17 15 12
02-23-2011 00:00:00 15 7 19 8 10 10 9 7 9 13 10 10 12 12 12 10 8 5 5 11 13 12 12 9
02-24-2011 00:00:00 8 10 7 7 6 5 7 3 0 1 5 9 11 6 1 1 2 0 -2 -3 -3 -2 -1 -1
02-25-2011 00:00:00 2 3 0 1 1 -3 0 4 3 5 5 6 8 8 16 11 6 1 -3 -3 2 6 7 9
02-26-2011 00:00:00 6 3 16 3 3 4 6 8 9 10 10 8 17 8 11 9 17 8 7 4 3 6 8 10
02-27-2011 00:00:00 10 16 13 12 11 10 11 10 19 16 17 22 20 20 16 13 9 4 0 -1 1 4 8 6
02-28-2011 00:00:00 5 9 13 6 2 6 11 18 13 16 29 27 21 21 25 16 18 35 30 29 25 13 15 20
03-01-2011 00:00:00 13 17 13 18 15 13 11 12 17 21 28 27 23 21 18 21 20 19 18 7 16 22 15 15
03-02-2011 00:00:00 19 12 20 15 13 10 11 14 17 15 17 19 21 22 14 11 4 5 22 21 1 2
03-03-2011 00:00:00 19 9 8 15 10 7 3 5 10 9 9 9 2 -2 -4 -5 -5 -3 -1 -1 -5 -5 -1 -1
03-04-2011 00:00:00 -1 2 0 -3 -3 -3 -5 -4 -2 -1 -1 1 1 -1 -2 -3 -3 -1 -2 -4 -7 -7 -4 1
03-05-2011 00:00:00 4 2 2 0 -1 2 1 -5 -8 -4 -4 -1 2 5 8 6 4 3 -1 2 7 8 2 1
03-06-2011 00:00:00 2 1 -1 -3 -2 1 1 -2 -2 2 5 10 13 20 22 16 12 13 18 18 18 10 17 17
03-07-2011 00:00:00 0 2 3 21 8 9 9 9 11 10 12 18 16 12 25 19 10 7 2 3 8 12 11 17
03-08-2011 00:00:00 15 11 9 6 7 10 9 8 8 7 10 16 17 15 20 25 17 26 21 37 14 17 21 16
03-09-2011 00:00:00 25 12 12 7 9 14 17 14 14 17 12 16 21 20 25 33 29 33 42 28 18 19 30 28
03-10-2011 00:00:00 21 29 34 28 27 28 12 20 17 25 17 10 11 12 22 11 10 12 13 12 13 19 14 14
03-11-2011 00:00:00 18 13 17 4 4 17 17 11 5 5 12 11 8 9 9 9 11 16 5 8 12 10 10 11
03-12-2011 00:00:00 10 12 11 5 3 7 10 11 9 6 6 9 11 12 10 9 11 15 14 11 9 10 10 16
03-13-2011 00:00:00 15 15 7 7 8 5 3 4 6 8 7 7 7 9 9 6 0 -3 5 7 3 2 5 7
03-14-2011 00:00:00 5 2 2 7 7 5 2 2 6 6 6 8 8 7 8 9 5 0 1 3 6 6 6 9
03-15-2011 00:00:00 8 4 2 4 4 4 5 6 6 5 4 6 4 5 9 6 7 7 5 8 11 9 6 5
03-16-2011 00:00:00 7 7 6 3 0 1 3 4 5 4 4 6 9 12 11 10 11 10 4 2 2 3 1 -1
03-17-2011 00:00:00 1 0 -3 -5 -3 -3 -4 -3 1 3 2 6 7 7 8 8 8 7 3 3 5 2 -1 -1
03-18-2011 00:00:00 -1 -1 -1 1 2 3 2 1 2 1 1 6 8 10 11 8 6 7 6 2 -2 -1 1 3
03-19-2011 00:00:00 6 8 9 5 4 8 7 3 2 5 7 5 6 6 4 7 7 3 0 -1 4 5 1 2
03-20-2011 00:00:00 4 3 1 1 3 1 1 4 2 4 16 21 25 22 14 19 10 5 -2 -2 1 3 6 6
0
Comment
Question by:libertyforall2
  • 3
  • 2
5 Comments
 
LVL 10

Expert Comment

by:jeromee
ID: 36476541
Try this:

perl -ane 'print "@F[0,1]".join("", map{$_>=0 ? " ".($_+0) : ""} @F[2..25])."\n"' /your/file
0
 

Author Comment

by:libertyforall2
ID: 36476566
This creates zero values where no values are present. This will mess up my data. Is there a way to do without creating the extra zero's?
0
 
LVL 10

Accepted Solution

by:
jeromee earned 2000 total points
ID: 36476744
Why do you say that replaced negative numbers with zero?
Look at the 3rd line... the series
4 0 -2 -1 0 1
turned into:
4 0 0 1

% head -3 /tmp/abc
02-03-2011 00:00:00 13 16 19 22 21 14 12 10 11 15 14 23 25 24 23 17 20 26 23 27 26 23 15 10
02-04-2011 00:00:00 12 18 18 14 19 4 6 6 6 8 10 12 19 17 12 7 3 3 2 0 3 3 1 1
02-05-2011 00:00:00 3 3 5 11 8 19 5 5 4 5 6 7 7 5 6 4 0 -2 -1 0 1 0 0 3
% perl -ane 'print "@F[0,1]".join("", map{$_>=0 ? " ".($_+0) : ""} @F[2..25])."\n"' /tmp/abc | head -3
02-03-2011 00:00:00 13 16 19 22 21 14 12 10 11 15 14 23 25 24 23 17 20 26 23 27 26 23 15 10
02-04-2011 00:00:00 12 18 18 14 19 4 6 6 6 8 10 12 19 17 12 7 3 3 2 0 3 3 1 1
02-05-2011 00:00:00 3 3 5 11 8 19 5 5 4 5 6 7 7 5 6 4 0 0 1 0 0 3

Open in new window

0
 

Author Closing Comment

by:libertyforall2
ID: 36477043
I was able to incorporate it in a top line script so this is no longer needed.
0
 
LVL 10

Expert Comment

by:jeromee
ID: 36478552
Glad I was able to help.

Happy Perl'ing!
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

The SignAloud Glove is capable of translating American Sign Language signs into text and audio.
Why WooCommerce is one of the majorly favored choices when it comes to having an eCommerce store. This article will acquaint you with some reasons that I believe make it one of the best eCommerce platforms available.
Simple Linear Regression
Starting up a Project

589 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question