>>> "UB" == Uwe Brauer <o...@mat.ucm.es> writes: > Hi
> I am not sure whether this is the right place to ask this, but anyhow. > Suppose two friends want to buy Christmas presents, but when they have > finished, they want to have spent the same amount of money. If they > don't a compensation must be transferred. > Here is an example > ** Start > #+name: presents > #+begin_src ledger > 2010/01/01 * Starting balance > assets:bank:savings 0 > income:starting balances > 2021/12/01 User1:Jacket > expenses:User1:Jacket 80 > income:User1:creditcard1 > 2010/07/24 User1:Pajama > expenses:User1:Pajama 30 > income:User1:creditcard1 > 2010/07/23 User2:Flowers > expenses:User2:Flowers 20 > income:User2:creditcard2 > 2010/07/23 User2:ChristmasTree > expenses:User2:ChristmasTree 40.00 > income:User2:creditcard2 > #+end_src > #+RESULTS: presents > #+begin_example > 170 expenses > 110 User1 > 80 Jacket > 30 Pajama > 60 User2 > 40 ChristmasTree > 20 Flowers > -170 income > -110 User1:creditcard1 > -60 User2:creditcard2 > -------------------- > 0 > #+end_example > So user1 spent 110, while user2 spent 60 > ** Compensation manually > So the compensation is (trivally) > | User1 | User2 | User2-->Uwer1 | > |-------+-------+---------------| > | 110 | 60 | -25 | > #+TBLFM: $3=($2-$1)/2;f2 > Leading to > #+name: compensated > #+begin_src ledger > 2010/01/01 * Starting balance > assets:bank:savings 0 > income:starting balances > 2021/12/01 User1:Jacket > expenses:User1:Jacket 80 > income:User1:creditcard1 > 2010/07/24 User1:Pajama > expenses:User1:Pajama 30 > income:User1:creditcard1 > 2010/07/23 User2:Flowers > expenses:User2:Flowers 20 > income:User2:creditcard2 > 2010/07/23 User2:ChristmasTree > expenses:User2:ChristmasTree 40.00 > income:User2:creditcard2 > 2010/07/23 User2:User1-Compensation > expenses:User2:User1-Compensation 25.00 > expenses:User1:User1-Compensation > #+end_src > #+RESULTS: compensated > #+begin_example > 170 expenses > 85 User1 > 80 Jacket > 30 Pajama > -25 User1-Compensation > 85 User2 > 40 ChristmasTree > 20 Flowers > 25 User1-Compensation > -170 income > -110 User1:creditcard1 > -60 User2:creditcard2 > -------------------- > 0 > #+end_example > The question is can this be done automatically? > By this I mean > can > 2010/07/23 User2:User1-Compensation > expenses:User2:User1-Compensation 25.00 > expenses:User1:User1-Compensation > Somehow be generated automatically? The solution consists of #+name: compensated #+begin_src ledger 2010/01/01 * Starting balance assets:bank:savings 0 income:starting balances 2021/12/01 User1:Jacket expenses:User1:Jacket 80 income:User1:creditcard1 2010/07/24 User1:Pajama expenses:User1:Pajama 30 income:User1:creditcard1 2010/07/23 User2:Flowers expenses:User2:Flowers 20 income:User2:creditcard2 2010/07/23 User2:ChristmasTree expenses:User2:ChristmasTree 40.00 income:User2:creditcard2 2010/07/23 User2:User1-Compensation expenses:User2:User1-Compensation ((110-60)*0.5) expenses:User1:User1-Compensation #+end_src
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