@Test
public void testSetValue() {

	double[] expectedVectorData = { 4, 2 };
	IVector expectedVector = new SparseDoubleVector(expectedVectorData);
	double[] data = { 2, 2 };
	IVector vector = new SparseDoubleVector(data);
	vector.setValue(0, 4);
	assertEquals(expectedVector, vector);
}