Re: [PHP] Calculation assistance.. :)
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.. :)
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 (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Calculation assistance.. :)
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 gives me in PHP 0.00104167 = 1.25 / (12 * 100); -2.170138889 = 25000 * ( 0.00104167 / (1 - (1 + 0.00104167) ^ -12)) :: ^ is the problem ... The solution SHOULD be 2,097.47 ... Not 2.17 Would be willing to help correct this and make it valid in PHP? -- Stephen Johnson c | eh The Lone Coder http://www.thelonecoder.com continuing the struggle against bad code http://www.fortheloveofgeeks.com I¹m a geek and I¹m OK! --
Re: [PHP] Calculation assistance.. :)
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 ... And this calc is in the ASP Code : $nMonthlyInterest = $nRate / (12 * 100) //' Calculate monthly payment $nPayment = $nPrincipal * ( $nMonthlyInterest / (1 - (1 + $nMonthlyInterest) ^ -$iMonths)) Which then gives me in PHP 0.00104167 = 1.25 / (12 * 100); -2.170138889 = 25000 * ( 0.00104167 / (1 - (1 + 0.00104167) ^ -12)) :: ^ is the problem ... The solution SHOULD be 2,097.47 ... Not –2.17 Would be willing to help correct this and make it valid in PHP? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Calculation assistance.. :)
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 against bad code http://www.fortheloveofgeeks.com I¹m a geek and I¹m OK! -- From: Eric Gorr [EMAIL PROTECTED] 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 ... And this calc is in the ASP Code : $nMonthlyInterest = $nRate / (12 * 100) //' Calculate monthly payment $nPayment = $nPrincipal * ( $nMonthlyInterest / (1 - (1 + $nMonthlyInterest) ^ -$iMonths)) Which then gives me in PHP 0.00104167 = 1.25 / (12 * 100); -2.170138889 = 25000 * ( 0.00104167 / (1 - (1 + 0.00104167) ^ -12)) :: ^ is the problem ... The solution SHOULD be 2,097.47 ... Not 2.17 Would be willing to help correct this and make it valid in PHP? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Calculation assistance.. :)
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 that is producing even funkier results... doing pow( (1-(1+$nMonthlyInterest)) , ($iMonths*-1) ) ; Gives me : 4.2502451372964E-35 = 25000 * (0.00104167 / 6.1270975733019E +35); From: Eric Gorr [EMAIL PROTECTED] 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 ... And this calc is in the ASP Code : $nMonthlyInterest = $nRate / (12 * 100) //' Calculate monthly payment $nPayment = $nPrincipal * ( $nMonthlyInterest / (1 - (1 + $nMonthlyInterest) ^ -$iMonths)) Which then gives me in PHP 0.00104167 = 1.25 / (12 * 100); -2.170138889 = 25000 * ( 0.00104167 / (1 - (1 + 0.00104167) ^ -12)) :: ^ is the problem ... The solution SHOULD be 2,097.47 ... Not –2.17 Would be willing to help correct this and make it valid in PHP? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Calculation assistance.. :)
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 / 6.1270975733019E+35); -- Stephen Johnson c | eh The Lone Coder http://www.thelonecoder.com continuing the struggle against bad code http://www.fortheloveofgeeks.com I¹m a geek and I¹m OK! -- From: Eric Gorr [EMAIL PROTECTED] 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 ... And this calc is in the ASP Code : $nMonthlyInterest = $nRate / (12 * 100) //' Calculate monthly payment $nPayment = $nPrincipal * ( $nMonthlyInterest / (1 - (1 + $nMonthlyInterest) ^ -$iMonths)) Which then gives me in PHP 0.00104167 = 1.25 / (12 * 100); -2.170138889 = 25000 * ( 0.00104167 / (1 - (1 + 0.00104167) ^ -12)) :: ^ is the problem ... The solution SHOULD be 2,097.47 ... Not 2.17 Would be willing to help correct this and make it valid in PHP? -- - Eugene Mah, M.Sc., DABR [EMAIL PROTECTED] Medical Physicist/Misplaced Canuck[EMAIL PROTECTED] Department of Radiology [EMAIL PROTECTED] Medical University of South Carolina For I am a Bear of Very Little Charleston, South Carolina Brain, and long words Bother http://www.netcom.com/~eugenem/me. Winnie the Pooh http://radinfo.musc.edu/~eugenem/blog/ PGP KeyID = 0x1F9779FD, 0x319393F4 PGP keys available on request ICQ 3113529 O- - -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Calculation assistance.. :)
Eric ... I LOVE YOU... Thanks -- Stephen Johnson c | eh The Lone Coder http://www.thelonecoder.com continuing the struggle against bad code http://www.fortheloveofgeeks.com I¹m a geek and I¹m OK! -- From: Eric Gorr [EMAIL PROTECTED] Date: Fri, 19 Sep 2008 16:13:49 -0400 To: Stephen 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 - pow( ( 1 + $nMonthlyInterest ), -$iMonths ) ) ) On Sep 19, 2008, at 3:48 PM, 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 / 6.1270975733019E +35); From: Eric Gorr [EMAIL PROTECTED] 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 ... And this calc is in the ASP Code : $nMonthlyInterest = $nRate / (12 * 100) //' Calculate monthly payment $nPayment = $nPrincipal * ( $nMonthlyInterest / (1 - (1 + $nMonthlyInterest) ^ -$iMonths)) Which then gives me in PHP 0.00104167 = 1.25 / (12 * 100); -2.170138889 = 25000 * ( 0.00104167 / (1 - (1 + 0.00104167) ^ -12)) :: ^ is the problem ... The solution SHOULD be 2,097.47 ... Not 2.17 Would be willing to help correct this and make it valid in PHP? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
