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Full Discussion: Removing a character at specific position in a column
Operating Systems Linux Removing a character at specific position in a column Post 302957569 by RavinderSingh13 on Tuesday 13th of October 2015 02:34:41 AM
Old 10-13-2015
Hello Syeda,

Here is an example suppose you want to substitute the 2nd occurrence of _ in $2 then following may help you.
Input_file:
Code:
Ravinder gi_49482297_ref_YP_039521.1_ TESTing test123 sizth_column_ seventh eight_column_test
TEST121 gi_49482297_ref_YP_039521.1_ TESTing test123 sizth_column_ seventh eight_column_test
TEST1211 gi_49482315_ref_YP_039539.1_ TESTing test123 sizth_column_ seventh eight_column_test
TEST12134 gi_49482315_ref_YP_039539.1_ TESTing test123 sizth_column_ seventh eight_column_test

Following is the code for same.
Code:
awk -vvar=2 '{split($2, A,"_");{for(i=1;i<=length(A);i++){if((i-1)==var){k=""} else {k="_"};q=q?q k A[i]:A[i]};$2=q;;q=""}} 1'  Input_file

Output will be as follows.
Code:
Ravinder gi_49482297ref_YP_039521.1_ TESTing test123 sizth_column_ seventh eight_column_test
TEST121 gi_49482297ref_YP_039521.1_ TESTing test123 sizth_column_ seventh eight_column_test
TEST1211 gi_49482315ref_YP_039539.1_ TESTing test123 sizth_column_ seventh eight_column_test
TEST12134 gi_49482315ref_YP_039539.1_ TESTing test123 sizth_column_ seventh eight_column_test

Here I have given a variable named var=2 in my code as I wanted to change only second occurrence in $2 of _.
You could change it accordingly as per your requirement too. Hope this helps.

Thanks,
R. Singh
This User Gave Thanks to RavinderSingh13 For This Post:
Syeda Sumayya
 

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LEARN ABOUT MOJAVE

git-column

GIT-COLUMN(1)                                                       Git Manual                                                       GIT-COLUMN(1)

NAME

       git-column - Display data in columns

SYNOPSIS

       git column [--command=<name>] [--[raw-]mode=<mode>] [--width=<width>]
                    [--indent=<string>] [--nl=<string>] [--padding=<n>]

DESCRIPTION

       This command formats its input into multiple columns.

OPTIONS

       --command=<name>
           Look up layout mode using configuration variable column.<name> and column.ui.

       --mode=<mode>
           Specify layout mode. See configuration variable column.ui for option syntax.

       --raw-mode=<n>
           Same as --mode but take mode encoded as a number. This is mainly used by other commands that have already parsed layout mode.

       --width=<width>
           Specify the terminal width. By default git column will detect the terminal width, or fall back to 80 if it is unable to do so.

       --indent=<string>
           String to be printed at the beginning of each line.

       --nl=<N>
           String to be printed at the end of each line, including newline character.

       --padding=<N>
           The number of spaces between columns. One space by default.

GIT

       Part of the git(1) suite

Git 2.17.1                                                          10/05/2018                                                       GIT-COLUMN(1)
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