Sed is a command-line stream editor for filtering and transforming text.
2
votes
5answers
101 views
How to delete empty comments with sed?
I want to delete empty Java comments like the following:
/**
*/
/*
*
*
*
*/
I tried it with sed, but the following deletes all comments, not just the empty ones:
sed -r ...
2
votes
3answers
38 views
remove white space before delimiter with sed
I have data of the following format that I want to input into LibreOffice calc
data | num | num | num | num
For some reason Libreoffice does not think the string "3214 " is a number by ...
1
vote
1answer
45 views
Combining files with 4 columns each, into 4 files for each column [closed]
So I have a bunch of text files which look like this:
T1
r1 a b c d
r2 d e f g
...
T2
r1 h i j k
r2 l m n o
...
And I want to make FOUR different text files in the following ...
0
votes
5answers
82 views
frequency of occurence
I have a tab-delimited text file, that is around 3K lines long.
I want to calculate frequency of data appearing in it, in 10,000 ranges.
Input.txt
Price
500
1500
10001
15000
17000
...
4
votes
4answers
63 views
sed on OSX insert at a certain line
So I've been using 'sed' on linux for a while, but have had a bit of difficulty trying to use it on OSX since 'POSIX sed' and 'GNU sed' have so many little differences. Currently I'm struggling with ...
4
votes
5answers
84 views
Sed: extending a string of numbers to a certain number of digits by padding with zeros
I'm currently trying to modify an echoed string of alphanumeric characters by piping it to sed. The area I'm interested in modifying is a block of numbers, which I would like to make 8 characters long ...
2
votes
4answers
105 views
Output some sections of a text file [closed]
I have input like the following:
>gi|481443199|gb|MH447771.1|
49 0 0 0 1
50 0 0 1 0
>gi|987078004|gb|RTYJ01067061.1|
412 0 0 1 ...
2
votes
4answers
93 views
Change currency format to generic number using sed
I am working on a large csv file with all coma separated entries. The entire document is composed of plain numbers, except for a few columns reflecting currencies that are formatted as text. For ...
1
vote
2answers
35 views
Complicated variable content failed to get into sed
The first line is variable ann hold quite complicated value. The reason I use the second line is because I don't want to change anything in the third line col1content. To change replacement, I just ...
3
votes
3answers
63 views
Sed processed file displays differently in vi vs cat
I can't tell if sed is mucking my file up. In vi or less it displays properly, but cat and more insert other characters. why are they showing up differently
I am on a redhat linux system with a ...
2
votes
5answers
64 views
Generate “item tag” pairs from “item,item,…|tag” lists [closed]
The characteristics of the input data:
Each line consists of two fields, separated by a pipe '|', where
the first field is a comma-separated list of items, and
the second field is a tag.
Input
...
4
votes
3answers
109 views
Delete the matching line and several more from a file
I have a text file called file_a.txt.
My first command is
grep -A 12 ".production =" file_a.txt
The output is a few block.
Each block of string contains 13 rows
I specifically want to delete all ...
0
votes
3answers
56 views
bash merge 2 lists removing duplicated
I have an embedded linux system using Busybox (OpenWRT) - so commands are limited. I have two files that look like:
first file
aaaaaa
bbbbbb
cccccc
mmmmmm
nnnnnn
second file
mmmmmm
nnnnnn
...
2
votes
3answers
84 views
Average rows with same first column
Given a file with two columns:
Id ht
510 69
510 67
510 65
5l0 62
510 59
601 29
601 26
601 21
601 20
I need a way to coalesce all rows with the same ID into one that has an average height. In this ...
3
votes
6answers
116 views
Extracting help message from script itself
I want that my help message be extracted from the script itself.
#!/bin/bash
#
# foo - do things
# Author: John Doe <jhon@doe>
# ----------------------------------------------
# SYNOPSIS
# ...
