public void ScalarMultiplyAndDivide() { DoubleVector a = new DoubleVector(new double[4]{0,1,2,3}); DoubleVector c = new DoubleVector(a); DoubleVector d = new DoubleVector(a); double scal = -4; c.Multiply(scal); d.Divide(scal); Assert.AreEqual(c[0],a[0]*scal); Assert.AreEqual(c[1],a[1]*scal); Assert.AreEqual(c[2],a[2]*scal); Assert.AreEqual(c[3],a[3]*scal); Assert.AreEqual(d[0],a[0]/scal); Assert.AreEqual(d[1],a[1]/scal); Assert.AreEqual(d[2],a[2]/scal); Assert.AreEqual(d[3],a[3]/scal); c = a*scal; Assert.AreEqual(c[0],a[0]*scal); Assert.AreEqual(c[1],a[1]*scal); Assert.AreEqual(c[2],a[2]*scal); Assert.AreEqual(c[3],a[3]*scal); c = scal*a; Assert.AreEqual(c[0],a[0]*scal); Assert.AreEqual(c[1],a[1]*scal); Assert.AreEqual(c[2],a[2]*scal); Assert.AreEqual(c[3],a[3]*scal); }