<?php
|
|
namespace Matrix\Operators;
|
|
use Matrix\Matrix;
|
use Matrix\Exception;
|
|
class Addition extends Operator
|
{
|
/**
|
* Execute the addition
|
*
|
* @param mixed $value The matrix or numeric value to add to the current base value
|
* @throws Exception If the provided argument is not appropriate for the operation
|
* @return $this The operation object, allowing multiple additions to be chained
|
**/
|
public function execute($value)
|
{
|
if (is_array($value)) {
|
$value = new Matrix($value);
|
}
|
|
if (is_object($value) && ($value instanceof Matrix)) {
|
return $this->addMatrix($value);
|
} elseif (is_numeric($value)) {
|
return $this->addScalar($value);
|
}
|
|
throw new Exception('Invalid argument for addition');
|
}
|
|
/**
|
* Execute the addition for a scalar
|
*
|
* @param mixed $value The numeric value to add to the current base value
|
* @return $this The operation object, allowing multiple additions to be chained
|
**/
|
protected function addScalar($value)
|
{
|
for ($row = 0; $row < $this->rows; ++$row) {
|
for ($column = 0; $column < $this->columns; ++$column) {
|
$this->matrix[$row][$column] += $value;
|
}
|
}
|
|
return $this;
|
}
|
|
/**
|
* Execute the addition for a matrix
|
*
|
* @param Matrix $value The numeric value to add to the current base value
|
* @return $this The operation object, allowing multiple additions to be chained
|
* @throws Exception If the provided argument is not appropriate for the operation
|
**/
|
protected function addMatrix(Matrix $value)
|
{
|
$this->validateMatchingDimensions($value);
|
|
for ($row = 0; $row < $this->rows; ++$row) {
|
for ($column = 0; $column < $this->columns; ++$column) {
|
$this->matrix[$row][$column] += $value->getValue($row + 1, $column + 1);
|
}
|
}
|
|
return $this;
|
}
|
}
|