LightJason - AgentSpeak(L++)
CNormalizedGraphLaplacian.java
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23 
24 package org.lightjason.agentspeak.action.builtin.math.blas.matrix;
25 
26 import cern.colt.matrix.tdouble.DoubleFactory2D;
27 import cern.colt.matrix.tdouble.DoubleMatrix2D;
28 import cern.colt.matrix.tdouble.impl.DenseDoubleMatrix1D;
36 
37 import javax.annotation.Nonnegative;
38 import javax.annotation.Nonnull;
39 import java.util.List;
40 import java.util.stream.IntStream;
41 
42 
51 public final class CNormalizedGraphLaplacian extends IAlgebra
52 {
56  private static final long serialVersionUID = 3481859239102399848L;
57 
62  {
63  super( 4 );
64  }
65 
66  @Nonnegative
67  @Override
68  public final int minimalArgumentNumber()
69  {
70  return 1;
71  }
72 
73  @Nonnull
74  @Override
75  public final IFuzzyValue<Boolean> execute( final boolean p_parallel, @Nonnull final IContext p_context,
76  @Nonnull final List<ITerm> p_argument, @Nonnull final List<ITerm> p_return )
77  {
78  CCommon.flatten( p_argument )
79  .map( ITerm::<DoubleMatrix2D>raw )
80  .map( i ->
81  {
82  final DoubleMatrix2D l_degree = DoubleFactory2D
83  .sparse
84  .diagonal( new DenseDoubleMatrix1D( IntStream.range( 0, i.rows() ).mapToDouble( j -> i.viewRow( j ).cardinality() ).toArray() ) );
85 
86  return DENSEALGEBRA.mult( DENSEALGEBRA.inverse( l_degree ), l_degree.assign( i, ( n, m ) -> n - m ) );
87  } )
88  .map( CRawTerm::from )
89  .forEach( p_return::add );
90 
91  return CFuzzyValue.from( true );
92  }
93 }
final IFuzzyValue< Boolean > execute(final boolean p_parallel, @Nonnull final IContext p_context, @Nonnull final List< ITerm > p_argument, @Nonnull final List< ITerm > p_return)
defines a plan-body operation
static< N > IFuzzyValue< N > from( @Nonnull final N p_value)
factory
common structure for execution definition
execution context with local data
Definition: IContext.java:42
static final DenseDoubleAlgebra DENSEALGEBRA
dense algebra
Definition: IAlgebra.java:39
static Stream< ITerm > flatten( @Nonnull final Collection<? extends ITerm > p_terms)
flat term-in-term collection into a straight term list
result for an immutable fuzzy value
static< N > CRawTerm< N > from(final N p_value)
factory for a raw term
Definition: CRawTerm.java:104
term structure for simple datatypes
Definition: CRawTerm.java:45