Examples of mikera.vectorz.Vector

mikera.vectorz.Vector
General purpose vector of arbitrary length, backed by an densely packed double[] array. This is the most efficient type for general purpose dense 1D vectors. @author Mike

  }
  
  
  @Test 
  public void testStridedAdd() {
    Vector v=Vector.of(1,2,3,4,5,6,7,8);
    StridedVector sv=StridedVector.wrap(v.data, 1, 3, 2);
    assertEquals(Vector.of(2,4,6),sv);
    
    sv.add(sv.exactClone());
    assertEquals(Vector.of(1,4,3,8,5,12,7,8),v);

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  public void timeJoinedVectorAddProduct(int runs) {
    AVector v=Vectorz.newVector(VECTOR_SIZE/2);
    v=v.join(Vectorz.newVector(VECTOR_SIZE-v.length()));


    Vector v2=new Vector(Vectorz.createUniformRandomVector(VECTOR_SIZE));
    for (int i=0; i<runs; i++) {
      v.addProduct(v2,v2,0.001);
    }
  }

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import org.junit.Test;


public class TestJoinedVector {
  
  @Test public void testJoinedArrays() {
    Vector v=Vector.of(1);
    
    AVector j=v;
    
    for (int i=0; i<10; i++) {
      j=j.join(v);
    }
    assertEquals(11,j.length());
    assertEquals(1.0, j.get(10),0.0);
    
    assertTrue(j instanceof JoinedArrayVector);
    v.set(0,2.0);
    assertEquals(2.0, j.get(10),0.0);  
  }

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    v.set(0,2.0);
    assertEquals(2.0, j.get(10),0.0);  
  }
  
  @Test public void testJoinedArrayAdd() {
    Vector v=Vector.of(0,0);
    
    AVector j=v;
    
    for (int i=0; i<10; i++) {
      j=j.join(Vector.of(0,0));
    }
    assertEquals(22,j.length());
    assertTrue(j.isZero());
    
    Vector d=Vector.createLength(j.length());
    Vectorz.fillIndexes(d);
    
    j.add(d);
    assertEquals(d,j);
  }

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    assertEquals(Vector.class, Vector.of(1,2,3).join(Vector0.INSTANCE).getClass());
  }


  
  @Test public void testJoinedViews() {
    Vector v=Vector.createLength(1000);
    Vectorz.fillIndexes(v);
    Vector is=v.clone();
    
    AVector jv=Vector0.INSTANCE;
    for (int i=0; i<1000; i+=10) {
      jv=jv.join(v.subVector(i, 10));
    }

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    assertEquals(3,v.get(1),0.000001);
    assertEquals(20100,v.get(100),0.000001);
  }
  
  @Test public void testJoinedArraySubs() {
    Vector v=Vector.of(0,1,2,3,4,5,6,7,8,9);
    
    AVector j=v;
    
    for (int i=0; i<10; i++) {
      AVector sv=v.subVector(i, 1);
      assertEquals(1,sv.length());
      j=j.join(v.subVector(i, 1));
    }
    assertEquals(20,j.length());
    assertEquals(JoinedArrayVector.class,j.getClass());
    
    assertEquals(v,j.subVector(10, 10));
    v.set(0,2.0);
    assertEquals(2.0, j.get(10),0.0);  
  }

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    v.set(0,2.0);
    assertEquals(2.0, j.get(10),0.0);  
  }
  
  @Test public void testJoinedVectorAdd() {
    Vector v=Vector.of(0,1,2,3,4,5,6,7,8,9);
    AVector j=v.clone().join(v.exactClone());
    
    j.add(5,v);
    
    assertEquals(4.0,j.get(4),0.0);
    assertEquals(13.0,j.get(9),0.0);

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    assertEquals(5.0,j.get(10),0.0);
    assertEquals(5.0,j.get(15),0.0);
  }
  
  @Test public void testJoinedCoalesce() {
    Vector a=Vector.of(0,1);
    Vector b=Vector.of(2,3);
    Vector c=Vector.of(4,5);
    
    JoinedArrayVector ja=(JoinedArrayVector)a.join(b.subVector(0, 1));
    JoinedArrayVector jb=(JoinedArrayVector)b.subVector(1, 1).join(c);
    
    assertEquals(ja,Vector.of(0,1,2));

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    assertEquals(Vector.of(0,1,2,3,4,5),jabc);
    assertEquals(3,jabc.numArrays());
  }
  
  @Test public void testJoinedVector3Add() {
    Vector v=Vector.of(0,1,2,3,4);
    AVector j=v.clone().join(v.exactClone());
    assertEquals(JoinedArrayVector.class,j.getClass());
    
    j.add(4,Vector3.of(10,20,30));
    
    assertEquals(3.0,j.get(3),0.0);

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    assertTrue(j.isFullyMutable());
  }
  
  @Test public void testVectorRejoin() {
    Vector v=Vector.createLength(10);
    Vectorz.fillGaussian(v);
    
    AVector rv=v.subVector(0, 3).join(v.subVector(3,5)).join(v.subVector(8,2));
    assertEquals(Vector.class,rv.getClass());
  }

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