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.
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 )
READ: PHP | checkdate() Function
Parameter Details
| Sr.No | Parameter | Description |
|---|---|---|
| 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
READ: PHP | Statistics Module
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.
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Thanks for reading and bye for now.
