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_beta() Function.
The built-in stats_rand_gen_beta() function generates a random deviate from the beta distribution.
The built-in stats_rand_gen_beta() function generates a random deviate from the beta distribution.
Syntax
Following below is the syntax to use this function -
float stats_rand_gen_beta( float $a, float $b )
Parameter Details
Sr.No | Parameter | Description |
---|---|---|
1 | a | The shape parameter of the beta distribution. |
2 | b | The shape parameter of the beta distribution. |
Return Value
It returns a random deviate from the beta distribution with parameters A and B. The density of the beta is x ^(a-1) * (1-x) ^ (b-1) / B(a,b) for 0<x<. Method R. C. H. Cheng.
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
Following example computes the random deviation from the beta distribution.
<?php var_dump(is_float(stats_rand_gen_beta(2, 3))); ?>
Output
When the above code is executed, it will produce the following result -
bool(true)
Example2
The following is an error case, in the below example, we passed a < 1e-37. A warning is shown in logs.
<?php // error cases var_dump(stats_rand_gen_beta(1e-38, 1)); // a < 1e-37 ?>
Output
The above code will produce the following result and a warning in logs PHP Warning: stats_rand_gen_beta(): 'a' or 'b' lower than 1.0E-37. 'a' value: 1.000000E-38 'b' value: 1.000000E+0
bool(false)
Example3
The following below is an error case. In the below example, we have passed b < 1e-37. A warning is shown in logs -
<?php // error cases var_dump(stats_rand_gen_beta(1, 1e-38)); // b < 1e-37 ?>
Output
The above code will produce the following result and a warning in logs PHP Warning: stats_rand_gen_beta(): 'a' or 'b' lower than 1.0E-37. 'a' value: 1.000000E+0 'b' value: 1.000000E-38
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_chisquare() 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.