Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be discussing briefly about the stats_rand_gen_ipoisson() function.
The built-in PHP stats_rand_gen_ipoisson() function generates a single random deviate from the Poisson distribution.
The built-in PHP stats_rand_gen_ipoisson() function generates a single random deviate from the Poisson distribution.
Syntax
Following below is the syntax to use this function -
int stats_rand_gen_ipoisson( float $mu )
Parameter Details
Sr.No | Parameter | Description |
---|---|---|
1 | mu | The parameter of the Poisson distribution |
Return Value
This PHP function returns a random deviate from the Poisson distribution, where mu is the parameter of the Poisson distribution.
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 example below computes the random deviation from the Poisson distribution with parameter 1 -
<?php var_dump(is_int(stats_rand_gen_ipoisson(1))); ?>
Output
When the above code is executed, it will produce the following result -
bool(true)
Example2
The example below computes the random deviation from the Poisson distribution with parameter 0 -
<?php var_dump(stats_rand_gen_ipoisson(0)); ?>
Output
When the above code is executed, it will produce the following result -
int(0)
Example3
Following is an error case. In the following example below, we have passed mu < 0. A warning is shown in logs -
<?php // error cases var_dump(stats_rand_gen_ipoisson(-0.1)); // mu < 0 ?>
Output
The above code will produce the following result and a warning in logs PHP Warning: stats_rand_gen_ipoisson(): mu < 0.0. mu : -1.000000E-1
bool(false)
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 built-in stats_rand_gen_iuniform() Function.
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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.
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Thanks for reading and bye for now.