Fill in missing rows with zero to have uniform table Post: 302939183

Sponsored Content

Top Forums Shell Programming and Scripting Fill in missing rows with zero to have uniform table Post 302939183 by rbatte1 on Monday 23rd of March 2015 01:34:20 PM

03-23-2015

Moderator

I suppose that you could read each line assuming that the first column is meant to increase sequentially, however another method might be to use the some reverse logic. Could you:-

Get every first column from file1 into a file index1, perhaps with cut
Edit the file to insert a leading carat ^ to each line
Use this to find records in file2 that are not in file1 using grep -vf
Append new records (with zero values) to file1
Sort file1 to put the records in order
Repeat the process for file2 selecting records listed in file1 (original or the updated one)

It seems a bit convoluted but I'm trying to think of the fewest I/O operations to achieve your goal, especially if you have very large files.
Would that give you an option, or are there likely to be records which are missing from both files?

Do let me know if I've missed the point entirely.

Kind regards
Robin

This User Gave Thanks to rbatte1 For This Post:

rbatte1

View Public Profile for rbatte1

Visit rbatte1's homepage!

Find all posts by rbatte1

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Fill in missing numbers in range

I need to edit a list of numbers on the following form: 1 1.0 2 1.4 5 2.1 7 1.9 I want: 1 1.0 2 1.4 3 0.0 4 0.0 5 2.1 6 0.0 7 1.9 (i want to add the missing number in column 1 together with 0.0 in column 2). I guess it is rather trivial but i didn't even manage to read column...

2. Shell Programming and Scripting

fill in missing columns

It can't be that hard, but I just can't figure it out: I have file like: File Sub-brick M_1 S_1 M_2 S_2 M_4 S_4 ... xxx 1 214 731 228 621 132 578 ... and would like to get 0 0 where M_3 S_3 is missing xxx 1 214 731 228 621 0 0 132 578 ... I wrote following script, but can't figure out...

3. Shell Programming and Scripting

Compare columns and rows with template, and fill empty slots.

Hi, I'm working on a script that will take the contents of a file, that is in a row and column format, and compare it to a arrangment file. Such that if there is any or all blanks in my content file, the blank will be filled with a flag and will retain the row and column configuration. Ex. ...

4. Shell Programming and Scripting

Fill missing numbers in second column with zeros

Hi All, I have 100 files with names like this: 1.dat, 2.dat, 3.dat until 100.dat. My dat files look like this: 42323 0 438939 1 434 0 0.9383 3434 120.23 3 234 As you can see in the second column, some numbers are missing. I want to fill those missing places with 0's in all...

5. Shell Programming and Scripting

Fill missing values with 2

Hi All, I have 100 .txt files which look like this: 3 4 5 6 7 Now, some files have some numbers missing in them and they look like this: 4 5 6

6. Shell Programming and Scripting

Fill in missing Data

hello everyone, I have a task to input missing data into a file. example of my data below: Wed Feb 01 09:00:02 EST 2012,,,0.4,0.3,,0.3,,0.3,,0.5,,0.3,,,0.4,0.3, Wed Feb 01 09:00:11 EST 2012,,,,,,,0.2,,,,,,,,,, Wed Feb 01 09:00:22 EST...

7. Shell Programming and Scripting

How to get the missing date and day in a table?

Hi Am using unix Aix Ksh Have Created table called vv and i have inserted two date Select * from vv; Output :- New_date 21/02/2013 24/02/2013 I have tried Using One query but Unsuccessful so far.. SELECT l.new_date + '1 day' as miss from vv as l

8. UNIX for Beginners Questions & Answers

Fill in missing hours and interpolate values using awk.

I have a time series data like this 40754,35.6931,51.3092,201610160700,21.0 40754,35.6931,51.3092,201610160800,23.0 40754,35.6931,51.3092,201610160900,24.0 40754,35.6931,51.3092,201610161000,24.0 40754,35.6931,51.3092,201610161300,25.0 40754,35.6931,51.3092,201610161400,23.0...

9. Shell Programming and Scripting

Fill in missing values

Hi, I have a data sample as shown below. I want to fill in the left column so that the line will be continuous. For example, between 1 and 5 should be 2,3,4. And corresponding values in the right column will be 0. Thus the expected data should look like that: 1 1 1 10 1 2 1 3 1 5 1 6 2 0...

LEARN ABOUT SUSE

lzcmp

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and  xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp or diff.  If only one file is specified, then the files compared are file1 (which must have a suffix of	a  supported  com-
       pression  format)  and  file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp or diff is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2009-07-05								 XZDIFF(1)