private void assertSmallDiff(DoubleVector v1, DoubleVector v2) {
assertEquals(v1.getLength(), v2.getLength());
for (int i = 0; i < v2.getLength(); i++) {
double d1 = v2.get(i);
assertEquals(v1.get(i), d1, 1E-5);
}
}
@Test
public void testOnes() {
DoubleVector vec = DenseDoubleVector.ones(10);
for (int i = 0; i < vec.getDimension(); ++i) {
assertEquals(1, vec.get(i), 0.000001);
}
}
public double getActiveLearningRatio(double qbcEntropy, DoubleVector combinedVote) {
int maxIndex = combinedVote.maxIndex();
int ensembleLength = this.ensemble.length;
double maxVote = combinedVote.getValue(maxIndex);
double activeLearningRatio = (qbcEntropy) * (maxVote / ensembleLength);
return activeLearningRatio;
}
@Test
public void testMinMax() {
double[] vals = {11, 2, 3, 4, 15, 6, 7, 8};
DoubleVector vec = new DenseDoubleVector(vals);
assertEquals(15, vec.max(), 0.000001);
assertEquals(2, vec.min(), 0.000001);
}
@Test(expected = IllegalArgumentException.class)
public void testVectorMultiplyMatrixAbnormal() {
DoubleVector vec = new DenseDoubleVector(new double[] {1, 2, 3});
DoubleMatrix mat =
new DenseDoubleMatrix(
new double[][] {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}, {13, 14, 15, 16}});
vec.multiply(mat);
}
@Test
public void invokeMethod() throws ScriptException, NoSuchMethodException {
Object obj = engine.eval("list(execute=sqrt)");
DoubleVector result = (DoubleVector) invocableEngine.invokeMethod(obj, "execute", 16);
assertThat(result.length(), equalTo(1));
assertThat(result.get(0), equalTo(4d));
}
@Test(expected = IllegalArgumentException.class)
public void testDotWithException() {
double[] vals1 = {1, 2, 3, 4, 5, 6, 7, 8};
double[] vals2 = {8, 7, 6, 5, 4, 3, 2, 1, 0};
DoubleVector vec1 = new DenseDoubleVector(vals1);
DoubleVector vec2 = new DenseDoubleVector(vals2);
vec1.dot(vec2);
}
@Test
public void invokeFunction() throws ScriptException, NoSuchMethodException {
engine.eval("f <- function(x) sqrt(x)");
DoubleVector result = (DoubleVector) invocableEngine.invokeFunction("f", 4);
assertThat(result.length(), equalTo(1));
assertThat(result.get(0), equalTo(2d));
}
@Test
public void testDotNormal() {
double[] arr1 = new double[] {1, 2, 3};
double[] arr2 = new double[] {4, 5, 6};
DoubleVector vec1 = new DenseDoubleVector(arr1);
DoubleVector vec2 = new DenseDoubleVector(arr2);
assertEquals(32.0, vec1.dot(vec2), 0.000001);
}
@Test(expected = IllegalArgumentException.class)
public void testDotAbnormal() {
double[] arr1 = new double[] {1, 2, 3};
double[] arr2 = new double[] {4, 5};
DoubleVector vec1 = new DenseDoubleVector(arr1);
DoubleVector vec2 = new DenseDoubleVector(arr2);
vec1.add(vec2);
}
@Test
public void testAddNormal() {
double[] arr1 = new double[] {1, 2, 3};
double[] arr2 = new double[] {4, 5, 6};
DoubleVector vec1 = new DenseDoubleVector(arr1);
DoubleVector vec2 = new DenseDoubleVector(arr2);
double[] arrExp = new double[] {5, 7, 9};
assertArrayEquals(arrExp, vec1.add(vec2).toArray(), 0.000001);
}
@Test
public void testMultiplyNormal() {
double[] arr1 = new double[] {1, 2, 3};
double[] arr2 = new double[] {4, 5, 6};
DoubleVector vec1 = new DenseDoubleVector(arr1);
DoubleVector vec2 = new DenseDoubleVector(arr2);
double[] arrExp = new double[] {4, 10, 18};
assertArrayEquals(arrExp, vec1.multiply(vec2).toArray(), 0.000001);
}
@Test
public void testVectorMultiplyMatrix() {
DoubleVector vec = new DenseDoubleVector(new double[] {1, 2, 3});
DoubleMatrix mat =
new DenseDoubleMatrix(new double[][] {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}});
double[] expectedRes = new double[] {38, 44, 50, 56};
assertArrayEquals(expectedRes, vec.multiply(mat).toArray(), 0.000001);
}
@Test
public void testSubtractNormal() {
double[] arr1 = new double[] {1, 2, 3};
double[] arr2 = new double[] {4, 5, 6};
DoubleVector vec1 = new DenseDoubleVector(arr1);
DoubleVector vec2 = new DenseDoubleVector(arr2);
double[] arrExp = new double[] {-3, -3, -3};
assertArrayEquals(arrExp, vec1.subtract(vec2).toArray(), 0.000001);
}
@Test
public void testSlice() {
double[] vals1 = {1, 2, 3, 4, 5, 6, 7, 8};
double[] vals2 = {2, 3, 4, 5, 6};
DoubleVector vec1 = new DenseDoubleVector(vals1);
DoubleVector vec2 = new DenseDoubleVector(vals2);
DoubleVector vec3 = vec1.sliceUnsafe(1, 5);
assertEquals(vec2, vec3);
}
@Test
public void testSliceNormal() {
double[] arr1 = new double[] {2, 3, 4, 5, 6};
double[] arr2 = new double[] {4, 5, 6};
double[] arr3 = new double[] {2, 3, 4};
DoubleVector vec1 = new DenseDoubleVector(arr1);
assertArrayEquals(arr2, vec1.slice(2, 4).toArray(), 0.000001);
DoubleVector vec2 = new DenseDoubleVector(arr1);
assertArrayEquals(arr3, vec2.slice(3).toArray(), 0.000001);
}
/**
* Returns {@code true} if the two vectors are equal to one another. Two {@code Vector} insances
* are considered equal if they contain the same number of elements and all corresponding pairs of
* {@code double} values are equal.
*/
public static boolean equals(DoubleVector v1, DoubleVector v2) {
if (v1.length() == v2.length()) {
int length = v1.length();
for (int i = 0; i < length; ++i) {
if (v1.get(i) != v2.get(i)) return false;
}
return true;
}
return false;
}
@Test
public void testSqrt() {
double[] vals1 = {1, 2, 3, 4, 5, 6, 7, 8};
DoubleVector vec1 = new DenseDoubleVector(vals1);
DoubleVector vec3 = vec1.sqrt();
for (int i = 0; i < vals1.length; ++i) {
assertEquals(Math.sqrt(vec1.get(i)), vec3.get(i), 0.000001);
}
}
@Test
public void testAbs() {
double[] vals = {1, 2, 3, 4, 5, 6, 7, 8};
DoubleVector vec = new DenseDoubleVector(vals);
DoubleVector vec2 = vec.abs();
for (int i = 0; i < vals.length; ++i) {
assertEquals(Math.abs(vec.get(i)), vec2.get(i), 0.000001);
}
}
@Test
public void testPow() {
double[] vals1 = {1, 2, 3, 4, 5, 6, 7, 8};
DoubleVector vec1 = new DenseDoubleVector(vals1);
int constant = 5;
DoubleVector vec3 = vec1.pow(constant);
for (int i = 0; i < vals1.length; ++i) {
assertEquals(Math.pow(vec1.get(i), 5), vec3.get(i), 0.000001);
}
}
@Test
public void testDivide() {
double[] vals1 = {1, 2, 3, 4, 5, 6, 7, 8};
DoubleVector vec1 = new DenseDoubleVector(vals1);
double constant = 10;
DoubleVector vec3 = vec1.divide(constant);
for (int i = 0; i < vals1.length; ++i) {
assertEquals(vec1.get(i) / constant, vec3.get(i), 0.000001);
}
}
@Test(expected = AssertionError.class)
public void deepCopy() {
double[] vals1 = {0, 1, 2, 3, 4, 5, 6, 7, 8};
double[] vals2 = {8, 7, 6, 5, 4, 3, 2, 1, 0};
DoubleVector vec1 = new DenseDoubleVector(vals1);
DoubleVector vec2 = new DenseDoubleVector(vals2);
DoubleVector vec3 = vec1.deepCopy();
vec1 = vec1.add(vec2);
assertEquals(vec1, vec3);
}
@Test
public void testSum() {
double[] vals = {1, 2, 3, 4, 5, 6, 7, 8};
DoubleVector vec = new DenseDoubleVector(vals);
double expected = 0;
double res = vec.sum();
for (int i = 0; i < vals.length; ++i) {
expected += vec.get(i);
}
assertEquals(expected, res, 0.000001);
}
@Test
public void testSubtractFrom() {
double[] vals1 = {1, 2, 3, 4, 5, 6, 7, 8};
DoubleVector vec1 = new DenseDoubleVector(vals1);
double constant = 10;
DoubleVector vec3 = vec1.subtractFrom(constant);
for (int i = 0; i < vals1.length; ++i) {
assertEquals(constant - vec1.get(i), vec3.get(i), 0.000001);
}
}
/**
* Creates a copy of a given {@code DoubleVector} with the same type as the original.
*
* @param source The {@code Vector} to copy.
* @return A copy of {@code source} with the same type.
*/
public static DoubleVector copyOf(DoubleVector source) {
if (source == null) return null;
DoubleVector result = null;
if (source instanceof SparseDoubleVector) {
result = new CompactSparseVector(source.length());
copyFromSparseVector(result, source);
} else if (source instanceof DenseVector || source instanceof ScaledDoubleVector) {
result = new DenseVector(source.length());
for (int i = 0; i < source.length(); ++i) result.set(i, source.get(i));
} else if (source instanceof AmortizedSparseVector) {
result = new AmortizedSparseVector(source.length());
copyFromSparseVector(result, source);
} else if (source instanceof DoubleVectorView) {
DoubleVectorView view = (DoubleVectorView) source;
return copyOf(view.getOriginalVector());
} else {
// Create a copy of the given class using reflection. This code
// assumes that the given implemenation of Vector has a constructor
// which accepts another Vector.
try {
Class<? extends DoubleVector> sourceClazz = source.getClass();
Constructor<? extends DoubleVector> constructor =
sourceClazz.getConstructor(DoubleVector.class);
result = (DoubleVector) constructor.newInstance(source);
} catch (Exception e) {
throw new Error(e);
}
}
return result;
}
@Test
public void testDot() {
double[] vals1 = {1, 2, 3, 4, 5, 6, 7, 8};
double[] vals2 = {8, 7, 6, 5, 4, 3, 2, 1};
DoubleVector vec1 = new DenseDoubleVector(vals1);
DoubleVector vec2 = new DenseDoubleVector(vals2);
double expected = 0.0;
double res = vec1.dotUnsafe(vec2);
for (int i = 0; i < vals1.length; ++i) {
expected += vec1.get(i) * vec2.get(i);
}
assertEquals(expected, res, 0.000001);
}
public TimeValue(DoubleVector month) {
dVal = Double.NaN;
monthVal = month;
currentValue = monthVal.get(0);
probVal = null;
monthProbVal = null;
}
@Test
public void testFromUpTo() {
double from = 11;
double to = 111.5;
double stepsize = 2.5;
DoubleVector vec = DenseDoubleVector.fromUpTo(from, to, stepsize);
int curIndex = 0;
double cur = 11;
while (cur <= to) {
assertEquals(cur, vec.get(curIndex), 0.000001);
cur += stepsize;
++curIndex;
}
}
public String toString() {
if (!Double.isNaN(dVal)) return Double.toString(dVal);
if (monthVal != null) return monthVal.toString();
if (probVal != null) return probVal.toString();
return monthProbVal.toString();
}
public DoubleVector crossProduct(DoubleVector... multiplicands) {
DoubleVector[] newMultiplicands = new DoubleVector[multiplicands.length + 1];
newMultiplicands[0] = asDoubleVector();
System.arraycopy(multiplicands, 0, newMultiplicands, 1, multiplicands.length);
return DoubleVector.crossProductAll(newMultiplicands);
}