ABSTRACT
The original definition of the Fourier transform was based on continuous functions,
possibly well-defined ones such as a polynomial, or perhaps a general function
such as that shown in Figure 46.1.
In engineering it is more likely that a series of data points will have been
collected rather than a continuous representation. The data are also often taken at a
constant rate and is therefore evenly spaced in time. Such a representation is shown
in Figure 46.2.
