seas {modTempEff} | R Documentation |
Function employed within the tempeff
formula to specify the variable with a smooth effect.
The function does not fit the model, it simply returns information exploited by tempeff
.
seas(x, ndx = stop("please, provide `ndx' in seas()"))
x |
the long term trend variable |
ndx |
the apparent dimension (i.e. the rank) of the B-spline employed to model the long trend. |
The function is used within the formula of tempeff()
when the long term trend of the daily time series
is fitted via a smooth term. A standard P-spline with a cubic B-spline basis and a second-order
difference penalty is employed.
A list with relevant information.
Vito Muggeo
Eilers, P., Marx, B. (1996). Flexible Smoothing with B-splines and Penalties Statistical Science 11, 89–121.
Wood, S.N. (2006) Generalized Additive Models: An Introduction with R. Chapman and Hall/CRC Press.