10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I have a file that looks like this:
n1 1
n2 1
n3 1
n4 3
n4 3
n2 5
n2 5
n2 5
n2 5
n3 5
n3 5
n4 6
n7 6
that is a name followed be a descriptive number.
I want to make these numbers sequential starting from 0 but without changing the "neighbours" each name belongs to. So the above... (3 Replies)
Discussion started by: FelipeAd
3 Replies
2. Shell Programming and Scripting
Hi
I have a file like this:
Peter North
Mary
Peter North
Peter Borough
Mary
I need there to put 'X' (or anything) on a new line between the two lines where 'Peter' begins the line. There will be many matches to this string, but they will always begin with 'Peter'.
Ie, the resulting... (2 Replies)
Discussion started by: majormajormajor
2 Replies
3. UNIX for Dummies Questions & Answers
Hi experts, I've been struggling to format a large genetic dataset. It's complicated to explain so I'll simply post example input/output
$cat input.txt
ID GENE pos start end
blah1 coolgene 1 3 5
blah2 coolgene 1 4 6
blah3 coolgene 1 4 ... (4 Replies)
Discussion started by: torchij
4 Replies
4. UNIX for Dummies Questions & Answers
I have a csv flatfile with a few million rows. I need to replace a field (field number is 85) in the file with a sequential number.
As an example, let's assume there are only 4 fields in the file:
A,A,,32
A,A,,27
A,B,,43
C,C,,354
If I wanted to amend the 3rd field in this way my... (2 Replies)
Discussion started by: BristolSmithy
2 Replies
5. Shell Programming and Scripting
Hi All,
I am looking for a simple way to write numbers to a file sequentially starting from 1 and ending on a specified upper limit. Example of the output file is below
Example
1
2
3
4
5
.
.
.
.
1000
please let me know the best way to do it. (10 Replies)
Discussion started by: Lucky Ali
10 Replies
6. Shell Programming and Scripting
I can rename a file with sequential numbers from 1 to N with this script:
num=1
for file in *.dat;do
mv "$file" "$(printf "%u" $num).txt"
let num=num+1
done
The script begins with renaming a some.dat file to 1.dat.txt and goes on sequentially renaming other DAT files to... (1 Reply)
Discussion started by: shoaibjameel123
1 Replies
7. Programming
Writing a Tool to simulate non-sequential disk I/O (simulate db file sequential read) in C POSIX
I have over the years come across the same issue a couple of times, and it normally is that the read speed on SAN is absolutely atrocious when doing non-sequential I/O to the disks. Problem being of... (7 Replies)
Discussion started by: vrghost
7 Replies
8. Shell Programming and Scripting
Hi there,
Firstly, I have no experience with shell scripts so would really appreciate some help.
I have the following shell script that is causing some problems:
moveit()
{
&& set -x
if
then
DOUBLE_DELIVERY=$(grep... (6 Replies)
Discussion started by: thebeno
6 Replies
9. Shell Programming and Scripting
I have a text file in the following format
....
START
1,1
2,1
3,1
..
..
9,1
10,1
END
....
I want to change to the output to
....
START
1,1
2,1
3,1
.. (4 Replies)
Discussion started by: VNR
4 Replies
10. Programming
We have to convert a sequential file to a 80 char line sequential file (HP UX platform).The sequential file contains special characters. which after conversion of the file to line sequential are getting coverted into "new line" or "tab" and file is getting distorted. Is there any way to read these... (2 Replies)
Discussion started by: Rajeshsu
2 Replies