# Dictionary:Vector

(vek’t∂r)

**1**. An ordered sequence of numbers; a 1×*n* matrix. Vectors are not restricted to three dimensions.

**2**. A one-dimensional array; a sequence of values that go together in some way, such as values of a wavelet at successive discrete time intervals. Thus a wavelet which has the values 0.75, 0.25, –0.50 at three successive time intervals and is zero at other times might be considered as a 3-term row vector, [0.75, 0.25, –0.50]. **Vector data** represent data as points, lines, or polygons. See *matrix*.

**3**. A quantity having both a magnitude and a direction; see Figure V-2. This is the intuitive definition which is equivalent to the mathematical definition: A vector is a rank-1 tensor.