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()"))
min(40,n/4)
where n
is the
time series length.
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.
Wood, S.N. (2006) Generalized Additive Models: An Introduction with R. Chapman and Hall/CRC Press.
csdl
, tempeff