Intelligent Information Systems
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Lecture 2 - Data statistics and transformation revision
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DFT and FFT Transformations
Discrete Fourier Transforms (DFT)
A non-linear transformation where the data is represented as a sum of harmonic Fourier series
A periodic signal (e.g sin) is characterised by one frequency. Every signal can be represented as a sum of periodic signals with different frequencies.
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Maintained by Dr Michael J. Watts (
mike.watts.net.nz
).