Definition
Data series analysis based on the concept that any graph (representation of a function) can be regarded as composed of an (almost) infinite series of sine and cosine functions. Thus, the response of a system to complex changes (stimuli) can be computed on the basis of its known response to simple changes. Fourier analysis is an important tool in disparate fields such as physical sciences and sales forecasting. Based on the work of the French mathematician Jean Baptiste Joseph Fourier (1768-1830) on heat flow in 1807. Also called harmonic analysis.
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