Hi Flashcoders,
I got a problem which I am in no way to figure out myself,
but someone here probably has a solution.
I found this function when I googled:
function Pmt(r, np, pv, fv) {
r = r/1200;
pmt = -(r*(fv+Math.pow(1+r, np)*pv)/(-1+Math.pow(1+r, np)))
return(pmt);
}
trace( Math.round(Pmt(5, 36, -273168.6, 190300)) );
BUT, the problem is that this "PMT"-function, which am used in programs
like Excel, .Net and so on,
also have a fifth paramater in which you can send in 0 or 1.
The function above behaves like sending in "0" as the fifth parameter
-as in as the loan is paid of the last day
in the month. But I need to send in "1", and get the result of when the
loan is being paid off the first every month.
the code above traces out "3277", and that is correct if I wanted it to
be when the loan is being paid of the last day in
every month, but I really need it to calculate the monthly payment as
occuring the last day of every month. So I really
want it to be 3263 ;)
Do you know how the line of code can be altered so it suits me?
Here is a description of the "standard" PMT, how it works:
http://www.techonthenet.com/excel/formulas/pmt.php
Thanks, Martin
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