I'm looking for a function, where the result is something like this:
I tried to figure it out myself, but I have no idea how to manage it.
f(x) = ...
Thanks in advance,
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A silly answer would be "fit a spline to your curve", but the meaningful answer tries to extract information on the condition of the heart from the characteristic features of the electrocardiogram; there is an extensive literature on this problem, see for example: