C# (CSharp) Lucene.Net.Misc SweetSpotSimilarity.SetBaselineTfFactors Examples

SetBaselineTfFactors() public method

Sets the baseline and minimum function variables for baselineTf

public SetBaselineTfFactors ( float @base, float min ) : void
@base	float
min	float
return	void

Example #1

File: SweetSpotSimilarityTest.cs Project: zhangbo27/lucenenet

        public void TestSweetSpotTf()
        {
            SweetSpotSimilarity ss = new SweetSpotSimilarity();

            TFIDFSimilarity d = new DefaultSimilarity();
            TFIDFSimilarity s = ss;

            // tf equal

            ss.SetBaselineTfFactors(0.0f, 0.0f);

            for (int i = 1; i < 1000; i++)
            {
                assertEquals("tf: i=" + i,
                             d.Tf(i), s.Tf(i), 0.0f);
            }

            // tf higher

            ss.SetBaselineTfFactors(1.0f, 0.0f);

            for (int i = 1; i < 1000; i++)
            {
                assertTrue("tf: i=" + i + " : d=" + d.Tf(i) +
                           " < s=" + s.Tf(i),
                           d.Tf(i) < s.Tf(i));
            }

            // tf flat

            ss.SetBaselineTfFactors(1.0f, 6.0f);
            for (int i = 1; i <= 6; i++)
            {
                assertEquals("tf flat1: i=" + i, 1.0f, s.Tf(i), 0.0f);
            }
            ss.SetBaselineTfFactors(2.0f, 6.0f);
            for (int i = 1; i <= 6; i++)
            {
                assertEquals("tf flat2: i=" + i, 2.0f, s.Tf(i), 0.0f);
            }
            for (int i = 6; i <= 1000; i++)
            {
                assertTrue("tf: i=" + i + " : s=" + s.Tf(i) +
                           " < d=" + d.Tf(i),
                           s.Tf(i) < d.Tf(i));
            }

            // stupidity
            assertEquals("tf zero", 0.0f, s.Tf(0), 0.0f);
        }

Example #2

File: SweetSpotSimilarityTest.cs Project: ChristopherHaws/lucenenet

        public void TestSweetSpotTf()
        {
            SweetSpotSimilarity ss = new SweetSpotSimilarity();

            TFIDFSimilarity d = new DefaultSimilarity();
            TFIDFSimilarity s = ss;

            // tf equal

            ss.SetBaselineTfFactors(0.0f, 0.0f);

            for (int i = 1; i < 1000; i++)
            {
                assertEquals("tf: i=" + i,
                             d.Tf(i), s.Tf(i), 0.0f);
            }

            // tf higher

            ss.SetBaselineTfFactors(1.0f, 0.0f);

            for (int i = 1; i < 1000; i++)
            {
                assertTrue("tf: i=" + i + " : d=" + d.Tf(i) +
                           " < s=" + s.Tf(i),
                           d.Tf(i) < s.Tf(i));
            }

            // tf flat

            ss.SetBaselineTfFactors(1.0f, 6.0f);
            for (int i = 1; i <= 6; i++)
            {
                assertEquals("tf flat1: i=" + i, 1.0f, s.Tf(i), 0.0f);
            }
            ss.SetBaselineTfFactors(2.0f, 6.0f);
            for (int i = 1; i <= 6; i++)
            {
                assertEquals("tf flat2: i=" + i, 2.0f, s.Tf(i), 0.0f);
            }
            for (int i = 6; i <= 1000; i++)
            {
                assertTrue("tf: i=" + i + " : s=" + s.Tf(i) +
                           " < d=" + d.Tf(i),
                           s.Tf(i) < d.Tf(i));
            }

            // stupidity
            assertEquals("tf zero", 0.0f, s.Tf(0), 0.0f);
        }