Module: MDS::Test::BundleMetric

Includes:
MatrixAssertions
Defined in:
lib/mds/test/bundles/bundle_metric.rb

Overview

Module containing standarized tests for MDS::Metric.

Instance Method Summary collapse

Methods included from MatrixAssertions

#assert_delta_matrices, #assert_equal_matrices

Instance Method Details

#test_d_2d ⇒ Object 



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# File 'lib/mds/test/bundles/bundle_metric.rb', line 47

def test_d_2d
  x = MDS::Matrix.create_rows(
    [1.0, 2.0], 
    [4.0, 3.0],
    [0.0, 1.0]
  )
  d = MDS::Metric.squared_distances(x)
  
  proj = MDS::Metric.projectd(d, 2)   
  dd = MDS::Metric.squared_distances(proj)    
  assert_delta_matrices(d, dd, 1e-5)
end

#test_d_5d ⇒ Object 



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# File 'lib/mds/test/bundles/bundle_metric.rb', line 73

def test_d_5d
  x = MDS::Matrix.create_random(10, 5, -10, 10)   
  d = MDS::Metric.squared_distances(x)
  proj = MDS::Metric.projectd(d, 10)   
  dd = MDS::Metric.squared_distances(proj)    
  assert_delta_matrices(d, dd, 1e-5)
end

#test_k_2d ⇒ Object 



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# File 'lib/mds/test/bundles/bundle_metric.rb', line 35

def test_k_2d
  x = MDS::Matrix.create_rows(
    [1.0, 2.0], 
    [4.0, 3.0],
    [0.0, 1.0]
  )
  d = MDS::Metric::squared_distances(x)
  proj = MDS::Metric.projectk(d, 0.99)   
  dd = MDS::Metric.squared_distances(proj)    
  assert_delta_matrices(d, dd, 1e-5)
end

#test_k_5d ⇒ Object 



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# File 'lib/mds/test/bundles/bundle_metric.rb', line 60

def test_k_5d
  x = MDS::Matrix.create_random(10, 5, -10, 10)   
  d = MDS::Metric.squared_distances(x)
  
  proj = MDS::Metric.projectk(d, 1.0)   
  dd = MDS::Metric.squared_distances(proj)    
  assert_delta_matrices(d, dd, 1e-5)
  
  proj = MDS::Metric.projectk(d, 0.8)   
  dd = MDS::Metric.squared_distances(proj)    
  assert_delta_matrices(d, dd, 5e2)
end

#test_squared_distances ⇒ Object 



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# File 'lib/mds/test/bundles/bundle_metric.rb', line 18

def test_squared_distances
  input = MDS::Matrix.create_rows(
    [1.0, 2.0], 
    [4.0, 3.0],
    [0.0, 1.0]
  )
  
  output = MDS::Matrix.create_rows(
    [0.0, 10.0, 2.0], 
    [10.0, 0.0, 20.0], 
    [2.0, 20.0, 0.0]
  )
  
  d = MDS::Metric.squared_distances(input)
  assert_equal_matrices(output, d)
end