Transposing a huge space delimited file


 
Thread Tools Search this Thread
# 8  
Quote:
Originally Posted by RudiC
I'm not sure any tool will handle lines at least 4 million chars long (one char cols assumed).
Many tools can do that including gawk and perl.
# 9  
Quote:
Originally Posted by elixir_sinari
Many tools can do that including gawk and perl.
Standard tool, then.

Even ordinary awk can handle this if you fiddle with the record and field separators so it reads one column at a time, what to do with it is the question. Millions of columns may verge on the point where awk's arrays start having index problems...

If this file has fixed size columns, an elegant solution may be possible. If not, I don't know if we can make anything faster.
This User Gave Thanks to Corona688 For This Post:
# 10  
I found this one-liner and it seems to do the trick:

Code:
awk '{for (i=1; i<=NF; i++) a[i]=a[i](NR!=1?FS:"")$i} END {for (i=1; i in a; i++) print a[i]}'

Thanks!
# 11  
I did this on a much smaller file:
Code:
$ cat file
GAATCCGGAAACAGCAACTTCAAANCA
GTNATTCGGGCCAAACTGTCGAA
$ mkfifo fifo1 fifo2
$ sed -n '2 {s:.:&\n:g;wfifo2
}
       ' file &
$ sed -n '1 {s:.:&\n:g;wfifo1
}
       ' file &
$ paste -d" " fifo1 fifo2
G G
A T
A N
.
.
.

Don't how it will deal with huuuge files...
 

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Help/Advise please for converting space delimited string variable to comma delimited with quote

Hi, I am wanting to create a script that will construct a SQL statement based on a a space delimited string that it read from a config file. Example of the SQL will be For example, it will read a string like "AAA BBB CCC" and assign to a variable named IN_STRING. I then concatenate... (2 Replies)
Discussion started by: newbie_01
2 Replies

2. Shell Programming and Scripting

Output file with <Tab> or <Space> Delimited

Input file: xyz,pqrs.lmno,NA,NA,NA,NA,NA,NA,NA abcd,pqrs.xyz,NA,NA,NA,NA,NA,NA,NA Expected Output: xyz pqrs.lmno NA NA NA NA NA NA NA abcd pqrs.xyz NA NA NA NA NA NA NA Command Tried so far: awk -F"," 'BEGIN{OFS=" ";} {print}' $File_Path/File_Name.csv Issue:... (5 Replies)
Discussion started by: TechGyaann
5 Replies

3. Shell Programming and Scripting

Remove space before numbers in delimited file

Hi, I have a file which looks like this FORD|1333-1| 10000100010203| 100040507697|0002|356.45|5555| SSSSY|KKKKM|1000005|10| N096|10043| C987 I need the output to look like this FORD|1333-1|10000100010203|100040507697|0002|356.45|5555| SSSSY|KKKKM|1000005|10| N096|10043| C987 The leading... (8 Replies)
Discussion started by: wahi80
8 Replies

4. Shell Programming and Scripting

Converting varied space delimited file to Pipedemilited

Hi all, I have source file, data looks like 12345 abc def 01 / 001200 C 2000 12345 abc def 01 / 001200 C 2500 12345 abcd def 01 / 001200 C 3500 18945 xyz pqr 01 / 009900 D 4000 5000 2800 9900 Expected ouput... (3 Replies)
Discussion started by: srk409
3 Replies

5. Shell Programming and Scripting

How to make tab delimited file to space delimited?

Hi How to make tab delimited file to space delimited? in put file: ABC kgy jkh ghj ash kjl o/p file: ABC kgy jkh ghj ash kjl Use code tags, thanks. (1 Reply)
Discussion started by: jagdishrout
1 Replies

6. UNIX for Dummies Questions & Answers

Changing only the first space to a tab in a space delimited text file

Hi, I have a space delimited text file but I only want to change the first space to a tab and keep the rest of the spaces intact. How do I go about doing that? Thanks! (3 Replies)
Discussion started by: evelibertine
3 Replies

7. UNIX for Dummies Questions & Answers

Swap two rows in a space delimited text file?

Hi, How do you swap two rows in a space delimited text file? Thanks! (4 Replies)
Discussion started by: evelibertine
4 Replies

8. Shell Programming and Scripting

How to convert a space delimited file into a pipe delimited file using shellscript?

Hi All, I have space delimited file similar to the one as shown below.. I need to convert it as a pipe delimited, the values inside the pipe delimited file should be as highlighted... AA ATIU2345098809 009697 005374 BB ATIU2345097809 005445 006518 CC ATIU9685098809 003215 003571 DD... (7 Replies)
Discussion started by: nithins007
7 Replies

9. UNIX for Dummies Questions & Answers

Converting Space delimited file to Tab delimited file

Hi all, I have a file with single white space delimited values, I want to convert them to a tab delimited file. I tried sed, tr ... but nothing is working. Thanks, Rajeevan D (16 Replies)
Discussion started by: jeevs81
16 Replies

10. UNIX for Dummies Questions & Answers

Searching for text in a Space delimited File

Hi I am trying to search a firewall syslog space delimeted file for all of the different tcp and udp destination ports. I know that grep will find lines that contain specific text. And I have tried using the the the cut command to cut out of the file certain colums. However the test I am... (6 Replies)
Discussion started by: andyblaylock
6 Replies

Featured Tech Videos