public function generate(SuiteDocument $results, Config $config)
{
$document = new Document();
$reportEl = $document->createRoot('reports');
$reportEl->setAttribute('name', $config->getName());
$reportEl = $reportEl->appendElement('report');
$descriptionEl = $reportEl->appendElement('description');
$descriptionEl->nodeValue = <<<EOT
Warning: The histogram report is experimental, it may change or be removed without warning in
future versions of PHPBench.
EOT;
$tableEl = $reportEl->appendElement('table');
foreach ($results->query('//subject') as $subjectEl) {
foreach ($subjectEl->query('.//variant') as $variantEl) {
$times = array();
foreach ($variantEl->query('.//iteration') as $iterationEl) {
$times[] = $iterationEl->getAttribute('rev-time');
}
if (count($times) > 1) {
$histogram = Statistics::histogram($times, $config['bins']);
$kde = new Kde($times);
$kdeX = Statistics::linspace(min($times), max($times), $config['bins'] + 1);
$kdeY = $kde->evaluate($kdeX);
} else {
$histogram = array((string) current($times) => 1);
$kdeY = array(null);
}
$counter = 0;
foreach ($histogram as $xValue => $frequency) {
$kdeVal = $kdeY[$counter++];
$rowEl = $tableEl->appendElement('row');
$cellEl = $rowEl->appendElement('cell');
$cellEl->setAttribute('name', 'benchmark');
$cellEl->nodeValue = functions\class_name($subjectEl->evaluate('string(ancestor::benchmark/@class)'));
$cellEl = $rowEl->appendElement('cell');
$cellEl->setAttribute('name', 'subject');
$cellEl->nodeValue = $subjectEl->evaluate('string(./@name)');
$cellEl = $rowEl->appendElement('cell');
$cellEl->setAttribute('name', 'index');
$cellEl->nodeValue = $counter;
$cellEl = $rowEl->appendElement('cell');
$cellEl->setAttribute('name', 'time');
$cellEl->nodeValue = $xValue;
$cellEl = $rowEl->appendElement('cell');
$cellEl->setAttribute('name', 'freq');
$cellEl->nodeValue = $frequency;
$cellEl = $rowEl->appendElement('cell');
$cellEl->setAttribute('name', 'kde');
$cellEl->nodeValue = $kdeVal;
}
}
}
return $document;
}
/**
* It should throw an exception if the linspace min and max are the same number.
*
* @expectedException InvalidArgumentException
* @expectedExceptionMessage Min and max cannot be the same number: 4
*/
public function testLinspaceMinMaxSame()
{
Statistics::linspace(4, 4, 10);
}
public function provideEvaluate()
{
return array(array(array(10, 20, 15, 5), Statistics::linspace(0, 9, 10), 'silverman', array(0.01537595, 0.0190706, 0.02299592, 0.02700068, 0.03092369, 0.0346125, 0.03794007, 0.0408159, 0.04318983, 0.04504829)), array(array(10, 20, 15, 5), Statistics::linspace(0, 3, 4), 'scott', array(0.01480612, 0.01869787, 0.02286675, 0.02713209)), array(array(10, 20, 15, 5), Statistics::linspace(0, 3, 4), 'silverman', array(0.01537595, 0.0190706, 0.02299592, 0.02700068)));
}
public function generatePoints($params)
{
$this->points = Statistics::linspace(1, 10, $params['points']);
}
