本文整理了Java中org.apache.mahout.math.Vector.size()方法的一些代码示例，展示了Vector.size()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Vector.size()方法的具体详情如下：
包路径：org.apache.mahout.math.Vector
类名称：Vector
方法名：size

Vector.size介绍

[英]Return the cardinality of the recipient (the maximum number of values)
[中]返回收件人的基数（最大值数）

代码示例

代码示例来源：origin: apache/mahout

@Override
public double aggregate(Vector other, DoubleDoubleFunction aggregator, DoubleDoubleFunction combiner) {
 Preconditions.checkArgument(size == other.size(), "Vector sizes differ");
 if (size == 0) {
  return 0;
 }
 return VectorBinaryAggregate.aggregateBest(this, other, aggregator, combiner);
}

代码示例来源：origin: apache/mahout

@Override
public double dot(Vector x) {
 if (size != x.size()) {
  throw new CardinalityException(size, x.size());
 }
 if (this == x) {
  return getLengthSquared();
 }
 return aggregate(x, Functions.PLUS, Functions.MULT);
}

代码示例来源：origin: apache/mahout

@Override
public Vector plus(Vector that) {
 if (size != that.size()) {
  throw new CardinalityException(size, that.size());
 }
 return createOptimizedCopy().assign(that, Functions.PLUS);
}

代码示例来源：origin: apache/mahout

@Override
public Matrix timesRight(Matrix that) {
 if (that.numRows() != diagonal.size()) {
  throw new IllegalArgumentException("Incompatible number of rows in the right operand of matrix multiplication.");
 }
 Matrix m = that.like();
 for (int row = 0; row < diagonal.size(); row++) {
  m.assignRow(row, that.viewRow(row).times(diagonal.getQuick(row)));
 }
 return m;
}

代码示例来源：origin: apache/mahout

public static void writeVector(DataOutput out, Vector vector, boolean laxPrecision) throws IOException {
 byte flags = flags(vector, laxPrecision);
 writeVectorFlagsAndSize(out, flags, vector.size());
 writeVectorContents(out, vector, flags);
}

代码示例来源：origin: apache/mahout

@Override
public Vector times(Vector that) {
 if (size != that.size()) {
  throw new CardinalityException(size, that.size());
 }
 if (this.getNumNondefaultElements() <= that.getNumNondefaultElements()) {
  return createOptimizedCopy(this).assign(that, Functions.MULT);
 } else {
  return createOptimizedCopy(that).assign(this, Functions.MULT);
 }
}

代码示例来源：origin: apache/mahout

@Override
public Vector assign(Vector other) {
 if (size() != other.size()) {
  throw new CardinalityException(size(), other.size());
 }
 values.clear();
 for (Element e : other.nonZeroes()) {
  setQuick(e.index(), e.get());
 }
 return this;
}

代码示例来源：origin: apache/mahout

@Test
public void testLike() {
 Vector other = test.like();
 assertTrue("not like", test.getClass().isAssignableFrom(other.getClass()));
 assertEquals("size", test.size(), other.size());
}

代码示例来源：origin: apache/mahout

public RandomAccessSparseVector(Vector other) {
 this(other.size(), other.getNumNondefaultElements());
 for (Element e : other.nonZeroes()) {
  values.put(e.index(), e.get());
 }
}

代码示例来源：origin: apache/mahout

@Test(expected = CardinalityException.class)
public void testAssignDoubleArrayCardinality() {
 double[] array = new double[test.size() + 1];
 test.assign(array);
}

代码示例来源：origin: apache/mahout

@Test
public void testPlusDouble() {
 Vector val = test.plus(1);
 assertEquals("size", test.size(), val.size());
 for (int i = 0; i < test.size(); i++) {
  if (i % 2 == 0) {
   assertEquals("get [" + i + ']', 1.0, val.get(i), EPSILON);
  } else {
   assertEquals("get [" + i + ']', values[i/2] + 1.0, val.get(i), EPSILON);
  }
 }
}

代码示例来源：origin: apache/mahout

@Test
public void testTimesVector() {
 Vector val = test.times(test);
 assertEquals("size", test.size(), val.size());
 for (int i = 0; i < test.size(); i++) {
  if (i % 2 == 0) {
   assertEquals("get [" + i + ']', 0.0, val.get(i), EPSILON);
  } else {
   assertEquals("get [" + i + ']', values[i/2] * values[i/2], val.get(i), EPSILON);
  }
 }
}

代码示例来源：origin: apache/mahout

@Test
public void testMinus() throws Exception {
 Vector val = test.minus(test);
 assertEquals("size", 3, val.size());
 for (int i = 0; i < test.size(); i++) {
  assertEquals("get [" + i + ']', 0.0, val.get(i), EPSILON);
 }
}

代码示例来源：origin: apache/mahout

@Test
public void testPlusDouble() throws Exception {
 Vector val = test.plus(1);
 assertEquals("size", 3, val.size());
 for (int i = 0; i < test.size(); i++) {
  assertEquals("get [" + i + ']', values[OFFSET + i] + 1, val.get(i), EPSILON);
 }
}

代码示例来源：origin: apache/mahout

private static void assertVectorEquals(Vector expected, Vector actual, double epsilon) {
 assertEquals(expected.size(), actual.size());
 for (Element x : expected.all()) {
  assertEquals(x.get(), actual.get(x.index()), epsilon);
 }
}

代码示例来源：origin: apache/mahout

@Test(expected = CardinalityException.class)
public void testAssignVectorCardinality() {
 Vector other = new DenseVector(test.size() - 1);
 test.assign(other);
}

代码示例来源：origin: apache/mahout

@Test
public void testAssignDoubleArray() {
 double[] array = new double[test.size()];
 test.assign(array);
 for (int i = 0; i < values.length; i++) {
  assertEquals("value[" + i + ']', 0.0, test.getQuick(i), EPSILON);
 }
}

代码示例来源：origin: apache/mahout

@Test
public void testCopy() {
 Vector copy = test.clone();
 for (int i = 0; i < test.size(); i++) {
  assertEquals("copy [" + i + ']', test.get(i), copy.get(i), EPSILON);
 }
}

代码示例来源：origin: apache/mahout

@Test
public void testViewPart() {
 Vector part = test.viewPart(1, 2);
 assertEquals("part size", 2, part.getNumNondefaultElements());
 for (int i = 0; i < part.size(); i++) {
  assertEquals("part[" + i + ']', test.get(i+1), part.get(i), EPSILON);
 }
}

代码示例来源：origin: apache/mahout

@Test
public void testGetDistanceSquared() {
 Vector other = new RandomAccessSparseVector(test.size());
 other.set(1, -2);
 other.set(2, -5);
 other.set(3, -9);
 other.set(4, 1);
 double expected = test.minus(other).getLengthSquared();
 assertTrue("a.getDistanceSquared(b) != a.minus(b).getLengthSquared",
       Math.abs(expected - test.getDistanceSquared(other)) < 10.0E-7);
}