Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Split the file based on column

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Split the file based on column
# 1  
Old 01-16-2013
Power Split the file based on column
Hi,

I have a file sample_1.txt (300k rows) which has data like below:

* Also each record is around 64k bytes

Code:
11|1|abc|102553|125589|64k bytes of data
10|2|def|123452|123356|......
13|2|geh|144351|121123|...
25|4|fgh|165250|118890|..
14|1|abc|186149|116657|......
21|7|def|207048|114424|......
23|7|geh|227947|112191|......
26|32|fgh|248846|109958|......
27|23|abc|269745|107725|......
29|34|def|290644|105492|......
30|32|geh|311543|103259|......
33|23|fgh|332442|101026|......
35|34|abc|353341|98793|......
37|7|def|374240|96560|......
39|4|geh|395139|94327|......
41|2|fgh|416038|92094|......
44|23|abc|436937|89861|......
46|1|def|457836|87628|......
48|3|geh|478735|85395|......
50|23|fgh|499634|83162|......

I am trying to split the files based on the 2nd column like below
sample_1_1.txt
Code:
11|1|abc|102553|125589|......
14|1|abc|186149|116657|......
46|1|def|457836|87628|......

sample_1_2.txt
Code:
10|2|def|123452|123356|......
13|2|geh|144351|121123|......
41|2|fgh|416038|92094|......

sample_1_3.txt
Code:
48|3|geh|478735|85395|......

and so on


Could some help me on this.

Thanks in advance
Last edited by sol_nov; 01-16-2013 at 03:45 PM..
# 2  
Old 01-16-2013
Code:
awk -F\| '{ filename="sample_1_"$2".txt"; print $0 > filename } ' sample_1.txt

This User Gave Thanks to Yoda For This Post:
sol_nov
# 3  
Old 01-16-2013
please check this way

Code:
grep "|1|" filename >> filename --> change |1| and redirect to file

---------- Post updated at 12:58 AM ---------- Previous update was at 12:54 AM ----------
# 4  
Old 01-16-2013
Power
Quote:
Originally Posted by bipinajith
Code:
awk -F\| '{ filename="sample_1_"$2".txt"; print $0 > filename } ' sample_1.txt

Thanks, But I have the record size around 64000 bytes, so it is failing with too long.

Can this be done using perl?
Last edited by sol_nov; 01-16-2013 at 03:46 PM..
# 5  
Old 01-16-2013
How about a KSH script?
Code:
#!/bin/ksh

while IFS="|" read f1 f2 f3
do
        echo "$f1|$f2|$f3" >> sample_1_$f2.txt
done < sample_1.txt

This User Gave Thanks to Yoda For This Post:
sol_nov
# 6  
Old 01-16-2013
An awk version that might circumvent the line limit get's a bit complicated, but you could try this:

Code:
awk '
  NR==1 && getline n {
    f="sample_1_" n ".txt"
    print $1 >> f
    print RS n >> f
    next
  }  
  NF==2 && getline n {
    print RS $1 FS >> f
    close(f)
    f="sample_1_" n ".txt"
    print $2  >> f
    print RS n  >> f
    next
  }
  {
    print RS $1 >> f
  } 
  END{
    print FS >> f
  }
' RS=\| ORS= FS='\n' infile

Last edited by Scrutinizer; 01-16-2013 at 04:59 PM..
# 7  
Old 01-16-2013
Any utility specified to read text files (including awk, grep, read, and sed) may fail on any line longer than LINE_MAX bytes long. The value of LINE_MAX on your system can be found by running the command: getconf LINE_MAX. The cut, paste, and fold utilities, however, are required to work with text files with unlimited line lengths. So, a way to do this is to:
1. Use cut to create a file just containing field 2 from your intput file into a file (e.g., name_list).
2. Use cut to create a file with the first LINE_MAX-5 bytes from of your input file into a file (e.g., part001).
3. Use cut to create other files with sequential sets of LINE_MAX-5 bytes from your input file (e.g., part002 ... partXXX) such that every of part of your input file has been split into a file with lines less than LINE_MAX bytes long.
4. Read name_list and calculate the name of the file to contain the reassembled input line.
5. Read a line from each of the partXXX files and write it to the appropriate output file. (Note that the writes may have to be done as a separate write for each partXXX file line adding a trailing newline character to the write of the last partXXX file.) You could also create separate output_field2_partXXX files, and use paste to create the final output files from these intermediate files.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

To Split the file based on column value

Hi Team, I have a requirement in such a way that need to split the file into two based on which column particular value appears.Please find my sample file below. Lets consider the delimiter of this file as either comma or two colons.(:: and ,). So I need to split the file in such a way that all... (2 Replies)
Discussion started by: ginrkf
2 Replies

2. UNIX for Beginners Questions & Answers

How to split a column based on |?

Hi all, Newbie here, so please bear over with my stupid question :) I have used far too long time today on figuring this out, so I hope that someone here can help me move on. I have some annotation data for a transcriptome where I want to split a column containing NCBI accession IDs into a... (7 Replies)
Discussion started by: BioBing
7 Replies

3. Shell Programming and Scripting

Split file based on a column/field value

Hi All, I have a requirement to split file into 2 sets of file. Below is a sample data of the file AU;PTN;24EX;25-AUG-14;AU;123;SE;123;Test NN;;;;ASD; AU;PTN;24EX;25-AUG-14;AU;456;SE;456;Test NN;;;;ASD; AU;PTN;24EX;25-AUG-14;AU;147;SE;147;Test NN;;;;ASD;... (6 Replies)
Discussion started by: galaxy_rocky
6 Replies

4. Shell Programming and Scripting

awk to sum a column based on duplicate strings in another column and show split totals

Hi, I have a similar input format- A_1 2 B_0 4 A_1 1 B_2 5 A_4 1 and looking to print in this output format with headers. can you suggest in awk?awk because i am doing some pattern matching from parent file to print column 1 of my input using awk already.Thanks! letter number_of_letters... (5 Replies)
Discussion started by: prashob123
5 Replies

5. UNIX for Dummies Questions & Answers

Split file based on column

i have file1.txt asdas|csada|130310|0423|A1|canberra sdasd|sfdsf|130426|2328|A1|sydney Expected output : on eaceh third and fourth colum, split into each two characters asdas|csada|13|03|10|04|23|A1|canberra sdasd|sfdsf|13|04|26|23|28|A1|sydney (10 Replies)
Discussion started by: radius
10 Replies

6. Shell Programming and Scripting

Split a file into multiple files based on line numbers and first column value

Hi All I have one query,say i have a requirement like the below code should be move to diffent files whose maximum lines can be of 10 lines.Say in the below example,it consist of 14 lines. This should be moved logically using the data in the fisrt coloumn to file1 and file 2.The data of first... (2 Replies)
Discussion started by: sarav.shan
2 Replies

7. Shell Programming and Scripting

How to split a fixed width text file into several ones based on a column value?

Hi, I have a fixed width text file without any header row. One of the columns contains a date in YYYYMMDD format. If the original file contains 3 dates, I want my shell script to split the file into 3 small files with data for each date. I am a newbie and need help doing this. (14 Replies)
Discussion started by: bhanja_trinanja
14 Replies

8. Shell Programming and Scripting

split the file based on the 2nd column passing as a parameter

I am unable to spit the file based on the 2nd column passing as a parameter with awk command. Source file: “100”,”customer information”,”10000” “200”,”customer information”,”50000” “300”,”product information”,”40000” script: the command is not allowing to pass the parameters with the awk... (7 Replies)
Discussion started by: number10
7 Replies

9. Shell Programming and Scripting

Split large file based on last digit from a column

Hello, What's the best way to split a large into multiple files based on the last digit in the first column. input file: f 2738483300000x0y03772748378831x1y13478378358383x2y23743878383802x3y33787828282820x4y43748838383881x5y5 Desired Output: f0 3738483300000x0y03787828282820x4y4 f1... (9 Replies)
Discussion started by: alain.kazan
9 Replies

10. Shell Programming and Scripting

Split single file into multiple files based on the number in the column

Dear All, I would like to split a file of the following format into multiple files based on the number in the 6th column (numbers 1, 2, 3...): ATOM 1 N GLY A 1 -3.198 27.537 -5.958 1.00 0.00 N ATOM 2 CA GLY A 1 -2.199 28.399 -6.617 1.00 0.00 ... (3 Replies)
Discussion started by: tomasl
3 Replies
Login or Register to Ask a Question