UNIX for Dummies Questions & Answers

Hi,

I'm trying to assign a score to each row which will allow me to identify which rows differ. In the example file below, I've used "," to indicate column separators (my actual file has tab separators). In this example, I'd like to identify that row 1 and row 5 are the same, and row 2 and row 4 are the same.
Any help much appreciated. Also, any comments on what the command lines do would be fantastic.
Thanks!!

example file:
0,0,1,0,1,0,0
0,1,0,0,0,0,1
0,0,0,0,0,0,0
0,1,0,0,0,0,1
0,0,1,0,1,0,0
0,0,0,1,0,0,0

example request output:
1
2
3
2
1
4

This will work to the sample file you provided, change to your requirement by changing the delimiter...

Code:

awk -F, '{arr[$0]=arr[$0]?arr[$0]:++i}{print arr[$0]}' infile

Works, thank you!!
Sorry to ask, but If you have a few mins spare, would it be possible to write a few brief notes on what the commands do? Still trying to work out how do arrays... If no time, no worries!
Thanks!

Code:

awk -F, '{arr[$0]=arr[$0]?arr[$0]:++i}

It just assigns the value of i by pre-incrementing, it checks first if arr[$0] has a value. If it has, it keeps the value or else it increments the value of i and assigns the value to arr[$0](Using Ternary Operator).

Code:

{print arr[$0]}' infile

This prints the value of arr[$0].

Great! Thank you!