Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: awk Grouping and Subgrouping with Counts
Top Forums UNIX for Dummies Questions & Answers awk Grouping and Subgrouping with Counts Post 302776795 by Don Cragun on Thursday 7th of March 2013 12:30:07 AM
Old 03-07-2013
Quote:
Originally Posted by JoshCrosby
No kidding, I wasn't aware of that ksh was on mac, never really looked though either.

1 question though for understanding. Would you mind explaining this piece, I know it's calling the products.txt file, just trying to understand it a bit better.

Code:
1{       # Process input data...
2        # Increment # of times we have seen this product.
3        p[$1]++
4        if(!(($1, $2) in s))
5                # Add a new skew for this product.
6                pl[$1, ++plc[$1]] = $2
7        # Increment # of times we have seen this skew with this product.
8        s[$1, $2]++
9}

Thanks again!
I added magenta line numbers to the code above to make it easier to refer to lines for this discussion.
  1. Since there is no condition on line 1, lines 1 through 9 will be executed for each line read from the input file.
  2. Line 3 adds 1 to p[$1]. $1 is the product from the input file. So, p[$1] is the number of times that the product specified in the first field of this input line has been seen so far in the input file.
  3. Line 4 tests whether or not the skew listed in the 2nd column of this input line has been seen on any other line we have read from the input file before.
  4. If this line is the first line that has this skew ($2) for this product ($1), line 6 increments the number of different skews that have been seen with this product (++plc[$1]) and saves this skew ($2) in the list of skews associated with this product (pl[$1, plc[$1]] = $2).
  5. Then line 8 increments the number of times this skew has been seen with this product (s[$1, $2]++).
This User Gave Thanks to Don Cragun For This Post:
JoshCrosby
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

counts

How can i do a simple record count in my shell script? i just want to count the number of records i receive from a specific file. (11 Replies)
Discussion started by: k@ssidy
11 Replies

2. UNIX for Dummies Questions & Answers

counts

To start I have a table that has ticketholders. Each ticket holder has a unique number and each ticket holder is associated to a so called household number. You can have multiple guests w/i a household. I would like to create 3 flags (form a, for a household that has 1-4 gst) form b 5-8 gsts... (3 Replies)
Discussion started by: sbr262
3 Replies

3. Shell Programming and Scripting

Grouping using sed/awk ?

I run awk cat $1|awk '{print $6}' and get a lot of results and I want results to group them. For example my result is (o/p is unknown to user) xyz xyz abc pqr xyz pqr etc I wanna group them as xyz=total found 7 abc=total .... pqr= Thank (3 Replies)
Discussion started by: pujansrt
3 Replies

4. Shell Programming and Scripting

awk grouping by name script

Hello I am trying to figure out a script which could group a log file by user names. I worked with awk command and I could trim the log file to: <USER: John Frisbie > /* Thu Aug 06 2009 15:11:45.7974 */ FLOAT GRANT WRITE John Frisbie (500 of 3005 write) <USER: Shawn Sanders > /* Thu Aug 06... (2 Replies)
Discussion started by: Avto
2 Replies

5. Shell Programming and Scripting

AWK script to create max value of 3rd column, grouping by first column

Hi, I need an awk script (or whatever shell-construct) that would take data like below and get the max value of 3 column, when grouping by the 1st column. clientname,day-of-month,max-users ----------------------------------- client1,20120610,5 client2,20120610,2 client3,20120610,7... (3 Replies)
Discussion started by: ckmehta
3 Replies

6. Shell Programming and Scripting

awk and perl grouping.

Hello folks. After awk, i have decided to start to learn perl, and i need some help. I have following output : 1 a 1 b 2 k 2 f 3 s 3 p Now with awk i get desired output by issuing : awk ' { a = a FS $2 } END { for ( i in a) print i,a }' input 1 a b 2 k f 3 s p Can... (1 Reply)
Discussion started by: Peasant
1 Replies

7. Shell Programming and Scripting

grouping using sed or awk

I have below inside a file. 11.22.33.44 user1 11.22.33.55 user2 I need this manipulated as alias server1.domain.com='ssh user1@11.22.33.44' alias server2.domain.com='ssh user2@11.22.33.55' (3 Replies)
Discussion started by: anil510
3 Replies

8. UNIX for Dummies Questions & Answers

awk adding counts together from column

Hello Im new treat me nicely, I have a headache :) I have a script that seemed to work now it doesnt anyway, the last part is adding counts of unique items in a csv file eg 05492U34 38 05492U34 47 two columns, (many different values like this in file) i want... (7 Replies)
Discussion started by: aniquebmx
7 Replies

9. Shell Programming and Scripting

Grouping and Subgrouping using awk

I have a data which looks like 1440993600|L|ABCDEF 1440993600|L|ABCD 1440993601|L|ABCDEF 1440993602|L|ABC 1440993603|L|ABCDE . . . 1441015200|L|AB 1441015200|L|ABC 1441015200|L|ABCDEF So basically, the $1 is epoch date, $2 and $3 is some application data From one if the... (5 Replies)
Discussion started by: hemanty4u
5 Replies

10. Shell Programming and Scripting

Output counts of all matching strings lessthan a number using awk

The awk below is supposed to count all the matching $5 strings and count how many $7 values is less than 20. I don't think I need the portion in bold as I do not need any decimal point or format, but can not seem to get the correct counts. Thank you :). file chr5 77316500 77316628 ... (6 Replies)
Discussion started by: cmccabe
6 Replies
All times are GMT -4. The time now is 08:13 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy