Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP stats_dens_pmf_poisson() Function.
The built-in PHP stats_dens_pmf_poisson() function is a Probability Mass Function of the poisson distribution.
The built-in PHP stats_dens_pmf_poisson() function is a Probability Mass Function of the poisson distribution.
Syntax
Following below is the syntax to use this function -
float stats_dens_pmf_poisson( float $x, float $lb )
Parameter Details
Sr.No | Parameter | Description |
---|---|---|
1 | x | The value at which the probability mass is calculated. |
2 | lb | The parameter of the poisson distribution |
Return Value
This function returns the probability mass at x, where the random variable follows the Poisson distribution whose parameter is lb or false on failure.
Dependencies
This built-in function was first introduced in statistics extension (PHP version 4.0.0 and PEAR v1.4.0). In this tutorial guide, we used the latest release of stats-2.0.3 (PHP v7.0.0 or newer and PEAR version 1.4.0 or newer).
Example1
The following example below computes the probability mass at each x -
<?php // check for each x foreach (range(0, 5) as $x) { var_dump(round(stats_dens_pmf_poisson($x, 1), 6)); echo "<br>"; } ?>
Output
When the above code is executed, it will produce the following result -
float(0.367879) float(0.367879) float(0.18394) float(0.061313) float(0.015328) float(0.003066)
Example2
The following example below computes the probability mass for each lb -
<?php // check for each lb foreach (range(0.5, 3, 0.5) as $lb) { var_dump(round(stats_dens_pmf_poisson(1, $lb), 6)); echo "<br>"; } ?>
Output
When the above code is executed, it will produce the following result -
float(0.303265) float(0.367879) float(0.334695) float(0.270671) float(0.205212) float(0.149361)
Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we are going to be discussing about the PHP stats_dens_t() Function.
Feel free to ask your questions where necessary and we will attend to them as soon as possible. If this tutorial was helpful to you, you can use the share button to share this tutorial.
Follow us on our various social media platforms to stay updated with our latest tutorials. You can also subscribe to our newsletter in order to get our tutorials delivered directly to your emails.
Thanks for reading and bye for now.
Feel free to ask your questions where necessary and we will attend to them as soon as possible. If this tutorial was helpful to you, you can use the share button to share this tutorial.
Follow us on our various social media platforms to stay updated with our latest tutorials. You can also subscribe to our newsletter in order to get our tutorials delivered directly to your emails.
Thanks for reading and bye for now.