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What is the most common approximation algorithm for sine function which can be implemented with self-organizing maps algorithm? I was thinking of least-squares approximation but I can't find a description of it for sine(or any trigonometrical) function.

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    Are you looking at real or complex arguments? $\sin x, x \in \mathbb{R}, \mathbb{C}$?2012-09-27
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    john, only real2012-09-27
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    Can you just sample the sine function at evenly space points and get something piecewise-linear? Then your SOM has to approach this collection of lines.2012-09-27

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