PHP | stats_absolute_deviation() Function

PHP stats_absolute_deviation() Function


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_absolute_deviation() Function.

The built-in PHP stats_absolute_deviation() function returns the absolute deviation of an array of values.

Syntax

Following below is the syntax to use this function -

float stats_absolute_deviation( array $a )


Parameter Details

Sr.NoParameterDescription
1

a

The array of data to find the standard deviation for. Note that all values of the array will be cast to float.


Return Value

This function returns the absolute deviation of an array of values in 'a', otherwise false if 'a' is empty or is not an array.

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 creates a standard absolute deviation of an array -

<?php
   $arr = array(1,37,4,5,47,87);
   var_dump(stats_absolute_deviation($arr));
?>

Output

When the above code is executed, it will produce the following result -

float(26.833333333333)

Example2

Following example returns false when array is empty -

<?php
   $arr = array();
   var_dump(stats_absolute_deviation($arr));
?>

Output

When the above code is executed, it will produce the following result -

bool(false)

Example3

Following example raises a warning as we pass a string value instead of an array -

<?php
   $arr = 'this is a string';
   var_dump(stats_absolute_deviation($arr));
?>

Output

When the above code is executed, it will produce the following result -

NULL


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_cdf_beta() 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.