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_stat_innerproduct() Function.
The PHP stats_stat_innerproduct() function returns an inner product of two vectors.
The PHP stats_stat_innerproduct() function returns an inner product of two vectors.
Syntax
Following below is the syntax to use this function -
float stats_stat_innerproduct( array $arr1, array $arr2 )
Parameter Details
Sr.No | Parameter | Description |
---|---|---|
1 | arr1 | The first array |
2 | arr2 | The second array |
Return Value
This PHP function returns an inner product of arr1 and arr2, 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 an inner product of arr1 and arr2 -
<?php var_dump(stats_stat_innerproduct(array(1, 2), array(3, 4))); ?>
Output
When the above code is executed, it will produce the following result -
float(11)
Example2
The following is an error case. In the below example, we have passed unequal length of arrays. A warning is shown in logs -
<?php // error cases var_dump(stats_stat_innerproduct(array(1, 2), array(3, 4, 5))); ?>
Output
The above code will produce the following result and a warning in logs PHP Warning: stats_stat_innerproduct(): Unequal number of X and Y coordinates.
bool(false)
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_stat_paired_t() Function.
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Thanks for reading and bye for now.