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_rand_gen_normal() function.
The PHP stats_rand_gen_normal() Function generates a single random deviate from the normal distribution.
The PHP stats_rand_gen_normal() Function generates a single random deviate from the normal distribution.
Syntax
Following below is the syntax to use this function -
float stats_rand_gen_normal( float $av, float $sd )
Parameter Details
Sr.No | Parameter | Description |
---|---|---|
1 | av | The mean of the normal distribution |
2 | sd | The standard deviation of the normal distribution |
Return Value
This built-in PHP function returns a random deviate from the normal distribution with av as the mean of the normal distribution and sd as the standard deviation of the normal 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
Below example generates a random deviate from the normal distribution with mean set to 0, and standard deviation set to 1 -
<?php var_dump(is_float(stats_rand_gen_normal(0, 1))); ?>
Output
When the above code is executed, it will produce the following result -
bool(true)
Example2
Below example generates a random deviate from the normal distribution with mean set to 0, and standard deviation set to 0 -
<?php var_dump(stats_rand_gen_normal(0, 0)); ?>
Output
When the above code is executed, it will produce the following result -
float(0)
Example3
Following is an error case. In the following example below, we have passed sd < 0. A warning is shown in logs -
<?php // error cases var_dump(stats_rand_gen_normal(0, -0.1)); // sd < 0 ?>
Output
The above code will produce the following result and a warning in logs PHP Warning: stats_rand_gen_normal(): sd < 0.0. sd: -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 PHP stats_rand_gen_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.