• Introduction
• Example

DifferenceColumn

Introduction #

DifferenceColumn is a process to add a differential column based on an existed column.

Example #

<?php
class MyReport extends \koolreport\KoolReport
{
    public function setup()
    {
        ...
        ->pipe(new \koolreport\processes\DifferenceColumn(array(
            "diff" => "dollar_sales",
        )))
        ...
    }
}

Code explanation:

In the above example, we create a column called "diff" value of which is difference between the "dollar_sales" column value of the current data row and the previous one.