Re: [PHP] Calculation assistance.. :)

2008-09-20 Thread Richard Heyes
Eric ... I LOVE YOU... Well Eric, I think you've pulled... -- Richard Heyes HTML5 Graphing for IE7, FF, Chrome, Opera and Safari: http://www.phpguru.org/RGraph -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php

Re: [PHP] Calculation assistance.. :)

2008-09-20 Thread tedd
At 8:25 PM +0100 9/20/08, Richard Heyes wrote: Eric ... I LOVE YOU... Well Eric, I think you've pulled... -- Richard Heyes Oh for Goodness sake, get a room. :-) Cheers, tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List

[PHP] Calculation assistance.. :)

2008-09-19 Thread Stephen Johnson
OK.. Math is NOT my forte ... I am converting a site from ASP to PHP ... And this calc is in the ASP Code : $nMonthlyInterest = $nRate / (12 * 100) //' Calculate monthly payment $nPayment = $nPrincipal * ( $nMonthlyInterest / (1 - (1 + $nMonthlyInterest) ^ -$iMonths)) Which then

Re: [PHP] Calculation assistance.. :)

2008-09-19 Thread Eric Gorr
I believe what you are looking is: http://us2.php.net/manual/en/function.pow.php number pow ( number $base , number $exp ) Returns base raised to the power of exp On Sep 19, 2008, at 3:34 PM, Stephen Johnson wrote: OK.. Math is NOT my forte ... I am converting a site from ASP to PHP

Re: [PHP] Calculation assistance.. :)

2008-09-19 Thread Stephen Johnson
Right ... But that is producing even funkier results... doing pow( (1-(1+$nMonthlyInterest)) , ($iMonths*-1) ) ; Gives me : 4.2502451372964E-35 = 25000 * (0.00104167 / 6.1270975733019E+35); -- Stephen Johnson c | eh The Lone Coder http://www.thelonecoder.com continuing the struggle

Re: [PHP] Calculation assistance.. :)

2008-09-19 Thread Eric Gorr
You originally had: $nPrincipal * ( $nMonthlyInterest / (1 - (1 + $nMonthlyInterest) ^ - $iMonths)) which, translate to in PHP $nPrincipal * ( $nMonthlyInterest / (1 - pow( ( 1 + $nMonthlyInterest ), -$iMonths ) ) ) On Sep 19, 2008, at 3:48 PM, Stephen Johnson wrote: Right ... But

Re: [PHP] Calculation assistance.. :)

2008-09-19 Thread Eugene Mah
I think you need to do pow((1+$nMonthlyInterest),($iMonths*-1)) Eugene Stephen Johnson wrote: Right ... But that is producing even funkier results... doing pow( (1-(1+$nMonthlyInterest)) , ($iMonths*-1) ) ; Gives me : 4.2502451372964E-35 = 25000 * (0.00104167 /

Re: [PHP] Calculation assistance.. :)

2008-09-19 Thread Stephen Johnson
Johnson [EMAIL PROTECTED] Cc: PHP list - not junk php-general@lists.php.net Subject: Re: [PHP] Calculation assistance.. :) You originally had: $nPrincipal * ( $nMonthlyInterest / (1 - (1 + $nMonthlyInterest) ^ - $iMonths)) which, translate to in PHP $nPrincipal * ( $nMonthlyInterest / (1