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Top Forums Shell Programming and Scripting Remove duplicates according to their frequency in column Post 302958059 by corfuitl on Monday 19th of October 2015 05:09:42 AM
Old 10-19-2015
Remove duplicates according to their frequency in column

Hi all,

I have huge a tab-delimited file with the following format and I want to remove the duplicates according to their frequency based on Column2 and Column3.

Code:
Column1 Column2 Column3 Column4 Column5 Column6 Column7
1    user1    access1    word    word    3    2
2    user2    access2    word    word    5    3
3    user1    access1    word    word    3    1
4    user1    access2    word    word    2    1


In this case, the result should be:

Code:
1    user1    access1    word    word    3    2
2    user2    access2    word    word    5    3

because user1 with access1 occur twice. Moreover, in case the original list contains the following entry:

Code:
5    user1    access2    word    word    2    1

The result should be

Code:
2    user2    access2    word    word    5    3
5    user1    access2    word    word    2    1

because user1 with access1 and user2 with access2 occur twice, so the smaller numbers of Column6 and Column7 should be taken into consideration.

Thanks in advance for your time and consideration.
 

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LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME
libbash -- A bash shared libraries package. DESCRIPTION
libbash is a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may want to load and use in scripts of your own. It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries. Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1). A bash shared library that can be loaded using ldbash(1) must answer 4 requirments: 1. It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash). 2. It must contain a line that begins with '#EXPORT='. That line will contain (after the '=') a list of functions that the library exports. I.e. all the function that will be usable after loading that library will be listed in that line. 3. It must contain a line that begins with '#REQUIRE='. That line will contain (after the '=') a list of bash libraries that are required for our library. I.e. every bash library that is in use in our bash library must be listed there. 4. The library must be listed (For more information, see ldbashconfig(8)). Basic guidelines for writing library of your own: 1. Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions. 2. Try to declare all variables intended for internal use as local. 3. Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with: __<library_name>_ For example, internal function myfoosort of hashstash library should be named as __hashstash_myfoosort This helps to avoid conflicts in global name space when using libraries that come from different vendors. 4. See html manual for full version of this guide. AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <ril@ran4.net> SEE ALSO
ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1) Linux Epoch Linux
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