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rspadim avatar rspadim commented on June 25, 2024 1

Frac diff can be implemented as a fir filter, lstm can learn the parameters, the point is, instead of feature scaling/manipulation with fracdiff, you are doing a model fitting with lstm (classifier/regressor), and as a model tou must check what it fits, noise or signal, that’s why you use filter and model in two steps, to know exactly ehat each one do

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Despair2000 avatar Despair2000 commented on June 25, 2024

Isn't this the reason why MLDP recommends fractional differentiation?

Having this said I'm not sure about this. Might also depend on the indicators you are looking a. I could imagine that there is value in adding such features but this is a guess. Maybe you simply give it a try and let us know what you find. :-)

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Baynez avatar Baynez commented on June 25, 2024

Isn't this the reason why MLDP recommends fractional differentiation?

Having this said I'm not sure about this. Might also depend on the indicators you are looking a. I could imagine that there is value in adding such features but this is a guess. Maybe you simply give it a try and let us know what you find. :-)

Recently heard about fractional differentiation, but sadly couldnt find anything useful to understand the concept, like a formula or so on google, could you explain or provide a link to help me understand?

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rspadim avatar rspadim commented on June 25, 2024

Lstm can reproduce a diff frac, the problem is if it will fit at noise or signal

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Despair2000 avatar Despair2000 commented on June 25, 2024

Maybe this helps:

https://github.com/philipperemy/fractional-differentiation-time-series

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Baynez avatar Baynez commented on June 25, 2024

Frac diff can be implemented as a fir filter, lstm can learn the parameters, the point is, instead of feature scaling/manipulation with fracdiff, you are doing a model fitting with lstm (classifier/regressor), and as a model tou must check what it fits, noise or signal, that’s why you use filter and model in two steps, to know exactly ehat each one do

So you mean i put this filter over every batch or how do you define filter (in python terms)?

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