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_variance() Function.
The PHP stats_variance() function returns the variance.
The PHP stats_variance() function returns the variance.
Syntax
Following below is the syntax to use this function -
float stats_variance( array $a [, bool $sample = false ] )
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 |
2 | sample | Indicates if a represents a sample of the population; defaults to false. |
Return Value
This built-in function returns the variance of values in a, 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).
Example
The below example computes the variance of values in a -
<?php $a=array(5,7,8,10,10); var_dump(stats_variance($a)); var_dump(stats_variance($a, true)); ?>
Output
When the above code is executed, it will produce the following result -
float(3.6) float(4.5)
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 String Functions.
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Thanks for reading and bye for now.