
Consider the example two-sample
signal

graphed in
Fig.
5.1.
Figure 5.1:
A length 2 signal
plotted as a vector in 2D space.
![\includegraphics[scale=0.7]{eps/vec2d}](http://www.dsprelated.com/josimages_new/mdft/img689.png) |
Under the geometric interpretation of a length

signal, each sample is a
coordinate in the

dimensional space. Signals which are only two
samples long are not terribly interesting to hear,
5.2 but they are easy to
plot geometrically.
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