Mercurial > hg > orthanc-stone
diff OrthancStone/UnitTestsSources/GenericToolboxTests.cpp @ 1984:187a261d7ae2
computation of mean and stddev in rectangle probes
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 31 Oct 2022 14:42:46 +0100 |
| parents | a2955abe4c2e |
| children | 07964689cb0b |
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--- a/OrthancStone/UnitTestsSources/GenericToolboxTests.cpp Mon Oct 31 12:32:47 2022 +0100 +++ b/OrthancStone/UnitTestsSources/GenericToolboxTests.cpp Mon Oct 31 14:42:46 2022 +0100 @@ -4499,3 +4499,28 @@ ASSERT_DOUBLE_EQ(9093 , v[10]); ASSERT_DOUBLE_EQ(0 , v[11]); } + + +TEST(LinearAlgebra, OnlineVarianceEstimator) +{ + OrthancStone::LinearAlgebra::OnlineVarianceEstimator e; + ASSERT_EQ(0u, e.GetCount()); + ASSERT_THROW(e.GetMean(), Orthanc::OrthancException); + ASSERT_THROW(e.GetVariance(), Orthanc::OrthancException); + ASSERT_THROW(e.GetStandardDeviation(), Orthanc::OrthancException); + + e.AddSample(42); + ASSERT_EQ(1u, e.GetCount()); + ASSERT_DOUBLE_EQ(42.0, e.GetMean()); + ASSERT_DOUBLE_EQ(0.0, e.GetVariance()); + ASSERT_DOUBLE_EQ(0.0, e.GetStandardDeviation()); + + e.Clear(); + e.AddSample(87.9); + e.AddSample(-82.4); + e.AddSample(17.3); + ASSERT_EQ(3u, e.GetCount()); + ASSERT_DOUBLE_EQ(7.6, e.GetMean()); + ASSERT_DOUBLE_EQ(7321.09, e.GetVariance()); + ASSERT_DOUBLE_EQ(85.5633683301447, e.GetStandardDeviation()); +}