ftcurvs

Hi all-
I am using ftcurvs to produce a smooth line through an observed temperature time series, sort of like a filter. This works great when the number of points is small (hourly time series), but not so great when I use 1 minute observations.

In all I have 31 time series that I run the ftcurvs function on. 29 of them turn out just fine. 2 of them have similar yet strange output. Attached is the example of a bad fit. The dashed line is the output from ftcurvs and the solid line is the observations. I have checked and checked again for missing data or strange values. There are none. Time increments by 1 minute with 1440 points, as do the other time series without problem.

I have d=0.4 to get a close fit. I am requesting the line fit with 96 points.

Does anyone know what might be going wrong to produce such a terrible fit?

James Correia Jr
Post Doc
PH: 372-6463
james.correia_at_pnl.gov

"Wisdom. Strength. Courage. Generosity. Each of us are born with one of these. We must find the other three inside of us."
-from "Into the West"

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