Bug #8624

quickly execution

Details

Request #8624	quickly execution
Submitted	2006-09-03 18:53 UTC
From	b_j at tar dot hu
Assigned	alejandrop
Status	Closed
Package	Math_Finance
PHP Version	Irrelevant
Roadmaps	(Not assigned)

Comments

[2006-09-03 18:53 UTC] b_j at tar dot hu

Description:
------------
Math/Finance.php
presentValue:
//$pv = (-$pmt * (1 + $rate * $type) * ((pow(1 + $rate, $nper) - 1) / $rate) - $fv) / pow(1 + $rate, $nper);
$q=pow(1 + $rate, $nper);
$pv = (-$pmt * (1 + $rate * $type) * (($q - 1) / $rate) - $fv) / $q;
futureValue:
//$fv = -$pv * pow(1 + $rate, $nper) - $pmt * (1 + $rate * $type) * (pow(1 + $rate, $nper) - 1) / $rate;
$q=pow(1 + $rate, $nper);
$fv = -$pv * $q - $pmt * (1 + $rate * $type) * ($q - 1) / $rate;
payment:
//$pmt = (-$fv - $pv * pow(1 + $rate, $nper)) / (1 + $rate * $type) / ((pow(1 + $rate, $nper) - 1) / $rate);
$q=pow(1 + $rate, $nper);
//$pmt = (-$fv - $pv * $q) / (1 + $rate * $type) / (($q - 1) / $rate);
$pmt = (-$fv - $pv * $q * $rate) / ((1 + $rate * $type) * ($q - 1)) ;
_tvm:
//return $pv * pow(1 + $rate, $nper) + $pmt * (1 + $rate * $type) * (pow(1 + $rate, $nper) - 1) / $rate + $fv;
$q=pow(1 + $rate, $nper);
return $pv * $q + $pmt * (1 + $rate * $type) * ($q - 1) / $rate + $fv;
_dtvm:
/*
return
$nper * $pv * pow(1 + $rate, $nper - 1) + $pmt *
($type * (pow(1 + $rate, $nper) - 1) / $rate
+ (1 + $rate * $type) * ($nper * $rate * pow(1 + $rate, $nper - 1)
- pow(1 + $rate, $nper) + 1) / pow($rate,2));
*/
$q =pow(1 + $rate, $nper);
$q1=pow(1 + $rate, $nper - 1);
$q2=pow($rate,2);
return
$nper * $pv * $q1 + $pmt * ($type * ($q - 1) / $rate +
(1 + $rate * $type) * ($nper * $rate * $q1 - $q + 1) / $q2);