Re: RPG math

[Jeff Young <jyoung0950@xxxxxxxxx>]

Dave,
Try using the Eval(R) op code.



On Thu, Apr 12, 2012 at 6:55 AM, Dave <dfx1@xxxxxxxxxxxxxx> wrote:

> Hi all,
>
> I recently asked how to access an EXCEL formula from an RPG program
> but here I am now having to reproduce the EXCEL PMT function in RPG.
> Maybe someone has already done this?
> Anyway, I've been given a formula to code and an EXCEL spreadsheet to
> control my results.
>
> Which I've coded like this :
>
>     MonthlyRate = interestRate /12;
>      MonthlyPayment = ( LoanAmount / MonthlyRate ) *  ( 1 - ( 1 +
> MonthlyRate ) ** ( -1  * numberOfPayments ));
>
> LoanRemaining =
>          12 * MonthlyPayment *
>          1 - ( 1 + MonthlyRate ) ** ( -1 * numberOfPayments -
> numberOfPaymentsMade ) /interestRate ;
>
>
> My fields are defined so (imposed) :
>
> LoanAmount,  MonthlyPayment, LoanRemaining 13S2
> numberOfPayments, numberOfPaymentsMade 3 I 0
>
>
> I've very little experience with RPG math and I'm worried about errors
> from intermediate calculations
> How should I define the rates MonthlyRate and interestRate so I don't
> get any loss of information after the divisions?
>
> Thanks.
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