Topic: Question about list Processing

[alex]

I have 1 lists.
1 c1 5
1 c2 6
2 c2 3
2 c3 1
3 c4 6
3 c1 2
……

What i want is :

   1 2 3  total
c1 5   2  7
c2 6 3    9
c3   1    1
c4     6  6
……

Thank you.

[MP]

Hi Robert.

[Lee Mac]

Maybe its just me, but I can't see how you get from list1 to list2...

[MP]

I can (find unique cars, list and sum items associated with the former ...), but sorry, I'm done doing his homework. Sharing techniques and knowledge is great, and principally what the swamp is based upon, but he continues to post questions that appear to come straight from class assignments. Providing solutions in this context is essentially helping the OP cheat, and cheating is not what the swamp is about. Could I be wrong? Absolutely, but the OP has not responded to these challenges in the past so I have to assume I'm right. Pass.

[alex]

Thanks.
I will work hard to figure it out by  myself.

[MP]

See? Again the challenge that this is a class assignment is neither acknowledged or refuted, nor does the OP ante up his efforts to solve the problem (until prodded).

[Lee Mac]

You can't progress without putting a effort into solving these sorts of problems yourself - and we aren't here just to serve up the answers.

Good point Michael.

[ronjonp]

The answer is eleven.

[dgorsman]

I can (find unique cars, list and sum items associated with the former ...), but sorry, I'm done doing his homework. Sharing techniques and knowledge is great, and principally what the swamp is based upon, but he continues to post questions that appear to come straight from class assignments. Providing solutions in this context is essentially helping the OP cheat, and cheating is not what the swamp is about. Could I be wrong? Absolutely, but the OP has not responded to these challenges in the past so I have to assume I'm right. Pass.

I've seen this on other forums.  In most circumstances where it is thought to be an assignment answers are posted a week (or several) later - well past any deadlines.