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How to find the smoothing parameter used by csaps

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Salma fathi
Salma fathi 2023-7-17
回答： Sulaymon Eshkabilov 2023-7-17
We have used the function csaps to fit some data using smoothing splines. We are intrested in knowing what is the smoothing parametrs that this function used to fit the data, how can we find that?

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Sulaymon Eshkabilov
Actually, when you empoly the fcn csaps(), you should specify the smoothing parameter value (p), e.g.:
pp = csaps(x,y,p)
pp = csaps(x,y,p,[],w)
values = csaps(x,y,p,xx)
values = csaps(x,y,p,xx,w)
In case, you have not specified p smoothing param value, by using a syntax: pp = csaps(x,y)
"By default, csaps chooses a value for the smoothing parameter p based on the given data sites x." - see DOC

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