PHP | stats_skew() 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_skew() Function.

The built-in stats_skew() function computes the skewness of the data in the array.

Syntax

Following below is the syntax to use this function -

float stats_skew( array $a )

READ: PHP | stats_rand_gen_noncentral_f() Function

Parameter Details

Sr.No	Parameter	Description
1	a	The input array

Return Value

This PHP function returns the skewness of values in a or 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 below example returns the skewness of values in an array -

<?php
   var_dump(sprintf("%2.9f", stats_skew(array(99,333,5, 7, 2, 4))));
?>

Output

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

string(11) "1.505674536"

Example2

Following is an error case. In the following example, we have passed an empty array. A warning is shown in logs -

<?php
   // error cases
   var_dump(stats_skew(array())); // empty array
?>

Output

The above code will produce the following result and a warning in logs PHP Warning: stats_skew(): The array has zero elements

bool(false)

READ: PHP | stats_rand_setall() Function

Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we will be studying about the PHP stats_standard_deviation() Function.

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