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PHP Statistics::lanczos方法代码示例

本文整理汇总了PHP中Statistics::lanczos方法的典型用法代码示例。如果您正苦于以下问题:PHP Statistics::lanczos方法的具体用法?PHP Statistics::lanczos怎么用?PHP Statistics::lanczos使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在Statistics的用法示例。


在下文中一共展示了Statistics::lanczos方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的PHP代码示例。

示例1: logGamma

 /**
  * Returns the value of log gamma(x) for x > 0.
  */
 public static function logGamma($x)
 {
     $ret;
     $half_log_2_pi = 0.5 * log(2.0 * M_PI);
     $lanczos_g = 607.0 / 128.0;
     if (is_nan($x) || $x <= 0.0) {
         $ret = NAN;
     } else {
         if ($x < 0.5) {
             return Statistics::logGamma1p($x) - log($x);
         } else {
             if ($x <= 2.5) {
                 return Statistics::logGamma1p($x - 0.5 - 0.5);
             } else {
                 if ($x <= 8.0) {
                     $n = intval(floor($x - 1.5));
                     $prod = 1.0;
                     for ($i = 1; $i <= $n; $i++) {
                         $prod = $prod * (x - $i);
                     }
                     return Statistics::logGamma1p($x - ($n + 1)) + log($prod);
                 } else {
                     $sum = Statistics::lanczos($x);
                     $tmp = $x + $lanczos_g + 0.5;
                     $ret = ($x + 0.5) * log($tmp) - $tmp + $half_log_2_pi + log($sum / $x);
                 }
             }
         }
     }
     return $ret;
 }
开发者ID:ehunter-usgs,项目名称:earthquake-rtgm-calculator,代码行数:34,代码来源:Statistics.class.php

示例2: notify

        notify('InverseCumulativeProbabilty out of range', $ex1, $ex1);
    }
    notify('InvGamma1pm1', 0.12837916709551, Statistics::invGamma1pm1(0.5));
    try {
        Statistics::invGamma1pm1(-2.5);
        notify('InvGamma1pm1 too small', "Exception thrown", "Ok");
    } catch (Exception $ex1) {
        notify('InvGamma1pm1 too small', $ex1, $ex1);
    }
    try {
        Statistics::invGamma1pm1(2.5);
        notify('InvGamma1pm1 too large', "Exception thrown", "Ok");
    } catch (Exception $ex1) {
        notify('InvGamma1pm1 too large', $ex1, $ex1);
    }
    notify('Lanczos', 19.194552097849, Statistics::lanczos(0.5));
    notify('LogGamma', 0.5723649429247, Statistics::logGamma(0.5));
    notify('RegularizedGammaP', 0.77932863808015, Statistics::regularizedGammaP(0.5, 0.75, 1.0E-15, 10000));
    notify('RegularizedGammaQ', 0.061368829139402, Statistics::regularizedGammaQ(0.5, 1.75, 1.0E-15, 10000));
    // Global test
    $rtgm->calculate();
    notify('Get risk coefficient', $riskCoeff, $rtgm->riskCoeff);
    notify('Get rtgm iter', $rtgmIters, $rtgm->rtgmIters);
    notify('Get risk iter', $riskIters, $rtgm->riskIters);
    printf("\nriskCoeff: %s\n", $rtgm->riskCoeff);
    printf("rtgmIters: [%s]\n", implode(', ', $rtgm->rtgmIters));
    printf("riskIters: [%s]\n", implode(', ', $rtgm->riskIters));
} catch (Exception $e) {
    print $e->getMessage() . "\n";
}
exit($exit_code);
开发者ID:hasimpson-usgs,项目名称:earthquake-rtgm-calculator,代码行数:31,代码来源:RTGM.test.php


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