Ejemplo n.º 1
0
<?php

function dot_product($v1, $v2)
{
    if (count($v1) != count($v2)) {
        throw new Exception('Arrays have different lengths');
    }
    return array_sum(array_map('bcmul', $v1, $v2));
}
echo dot_product(array(1, 3, -5), array(4, -2, -1)), "\n";
Ejemplo n.º 2
0
<?php

require "example.php";
$v = new_vector();
vector_x_set($v, 1.0);
vector_y_set($v, 2.0);
vector_z_set($v, 3.0);
$w = new_vector();
vector_x_set($w, 10.0);
vector_y_set($w, 11.0);
vector_z_set($w, 12.0);
echo "I just created the following vector\n";
vector_print($v);
vector_print($w);
echo "\nNow I'm going to compute the dot product\n";
$d = dot_product($v, $w);
echo "dot product = {$d} (should be 68)\n";
echo "\nNow I'm going to add the vectors together\n";
$r = new_vector();
vector_add($v, $w, $r);
vector_print($r);
echo "The value should be (11,13,15)\n";
echo "\nNow I'm going to clean up the return result\n";
#	free($r);
echo "Good\n";
?>