diff options
| -rw-r--r-- | tests/Unit/Entropy/EntropyTest.php | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tests/Unit/Entropy/EntropyTest.php b/tests/Unit/Entropy/EntropyTest.php index d56fcc8..0b3266f 100644 --- a/tests/Unit/Entropy/EntropyTest.php +++ b/tests/Unit/Entropy/EntropyTest.php @@ -77,5 +77,12 @@ class EntropyTest extends TestCase public function testSd($data, $sd) { $this->assertEquals(number_format($this->invokePrivate($this->entropy, 'sd', [$data]), 6), $sd); + $sum = 0.0, $mean = 0.0, $standardDeviation = 0.0; + foreach($data as $key => $value) { + $sum = $sum + pow($value, 2); + $mean = $this->invokePrivate($this->entropy, 'streamMean', [$mean, $value, $key + 1]); + $standardDeviation = $this->invokePrivate($this->entropy, 'streamStandardDeviation', [$key + 1, $sum, $mean]); + } + $this->assertEquals(number_format($standardDeviation, 6), $sd); } } |