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_uniform() Function.
The built-in stats_dens_uniform() function is a probability density function of the uniform distribution.
The built-in stats_dens_uniform() function is a probability density function of the uniform distribution.
Syntax
Following below is the syntax to use this function -
float stats_dens_uniform( float $x, float $a, float $b )
Parameter Details
Sr.No | Parameter | Description |
---|---|---|
1 | x | The value at which the probability density is calculated |
2 | a | The lower bound of the distribution |
3 | b | The upper bound of the distribution |
Return Value
This built-in function returns the probability density at x, where the random variable can follow the uniform distribution of which the lower bound and upper bound are a and b respectively, 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 density for condition A <= X <= B -
<?php var_dump(stats_dens_uniform(2.5, 1, 3)); // A <= X <= B ?>
Output
When the above code is executed, it will produce the following result -
float(0.5)
Example2
The following example below computes the probability density for condition X < A -
<?php var_dump(stats_dens_uniform(0, 1, 3)); // X < A ?>
Output
When the above code is executed, it will produce the following output -
float(0)
Example3
The following example below computes the probability density for condition X > B -
<?php var_dump(stats_dens_uniform(4, 1, 3)); // X > B ?>
Output
When the above code is executed, it will produce the following output -
float(0)
Example4
The following below is an error case. In the below example, we have passed A == B. A warning is shown in logs -
<?php // error cases var_dump(stats_dens_uniform(1, 1, 1)); // A == B ?>
Output
The above code will produce the following result and a warning in logs PHP Warning: stats_dens_uniform(): b == a == 1.000000E + 0
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 PHP stats_dens_weibull() Function.
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Thanks for reading and bye for now.