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How can I smooth a time series using splines

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Janet Reimer
Janet Reimer 2016-7-1
回答： Janet Reimer 2016-7-1
I have a time series with noisy data, but a clear seasonal signal. I want to remove the noise and then calculate the linear trend of the smoothed data. Previous published works have used splines so I would like to give this a try, but the Matlab examples don't work on my data set.

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Janet Reimer
Janet Reimer 2016-7-1
Example of the data...

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