<?php

namespace PhpOffice\PhpSpreadsheet\Calculation\Database;

use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
use PhpOffice\PhpSpreadsheet\Calculation\Statistical\Variances;

class DVar extends DatabaseAbstract
{
    /**
     * DVAR.
     *
     * Estimates the variance of a population based on a sample by using the numbers in a column
     * of a list or database that match conditions that you specify.
     *
     * Excel Function:
     *        DVAR(database,field,criteria)
     *
     * @param mixed[] $database The range of cells that makes up the list or database.
     *                                        A database is a list of related data in which rows of related
     *                                        information are records, and columns of data are fields. The
     *                                        first row of the list contains labels for each column.
     * @param int|string $field Indicates which column is used in the function. Enter the
     *                                        column label enclosed between double quotation marks, such as
     *                                        "Age" or "Yield," or a number (without quotation marks) that
     *                                        represents the position of the column within the list: 1 for
     *                                        the first column, 2 for the second column, and so on.
     * @param mixed[] $criteria The range of cells that contains the conditions you specify.
     *                                        You can use any range for the criteria argument, as long as it
     *                                        includes at least one column label and at least one cell below
     *                                        the column label in which you specify a condition for the
     *                                        column.
     *
     * @return float|string (string if result is an error)
     */
    public static function evaluate($database, $field, $criteria)
    {
        $field = self::fieldExtract($database, $field);
        if ($field === null) {
            return ExcelError::VALUE();
        }

        return Variances::VAR(
            self::getFilteredColumn($database, $field, $criteria)
        );
    }
}

• [F] DatabaseAbstract.php
  Delete
• [F] DAverage.php
  Delete
• [F] DCount.php
  Delete
• [F] DCountA.php
  Delete
• [F] DGet.php
  Delete
• [F] DMax.php
  Delete
• [F] DMin.php
  Delete
• [F] DProduct.php
  Delete
• [F] DStDev.php
  Delete
• [F] DStDevP.php
  Delete
• [F] DSum.php
  Delete
• [F] DVar.php
  Delete
• [F] DVarP.php
  Delete

Blog Section

Discover the Latest in Digital Payments and NFC Technology

Dive into our blog to explore the cutting-edge trends in digital payments and NFC technology. Stay updated on the innovations that are revolutionizing transactions, boosting security, and making payments quicker and more convenient. Learn how these advancements are shaping the future of financial interactions and driving the global transition towards a cashless world.

The Rise of Contactless Payments:...

In recent years, contactless payments have surged in popularity, driven...

Visit Blog

March 27, 2024

Enhancing Payment Security: The Role...

As digital transactions proliferate, ensuring robust payment security is more critical than ever. Two foundational...

Visit Blog

March 27, 2024

The Future of Digital Wallets:...

Digital wallets have fundamentally transformed how we manage money, offering a streamlined, secure, and highly...

Visit Blog

March 27, 2024