PHP Velho Oeste 2024

Statistic Funciones

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User Contributed Notes 2 notes

10 years ago
The source code actually has much more complete documentation (more functions, a better description of what they do, and parameters). You can see the latest here:

Notably, try clicking the latest revision number for php_stats.c
oliver at realtsp dot com
15 years ago
There are some undocumented functions in this extension, eg I found the following by reading the DCDFLIB docs and some trial and error:


* stats_cdf_normal($x, $mean, $sd, 1)
* @return float cumulative probablity
echo stats_cdf_normal(1.96, 0, 1, 1) . "\n";

* stats_cdf_normal($p, $mean, $sd, 1)
* @return float x which bounds cumulative probalility $p
echo stats_cdf_normal(0.975, 0, 1, 2) . "\n";

// less useful
// echo stats_cdf_normal(0.4,0.5,0.6,3) . "\n";
// echo stats_cdf_normal(0.4,0.5,0.6,4) . "\n";
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