plotting vignette: smooth maps

[cbeleites]

Smoothing of maps can be achieved via a variety of models and easily displayed using latticeExtra::panel.2dsmoother.

library (hyperSpec)
library (latticeExtra)

chondro  <- chondro - spc.fit.poly.below(chondro)
chondro  <- chondro / rowSums(chondro)

plotmap (chondro [,,785], col.regions = alois.palette())
plotmap (chondro [,,785], col.regions = alois.palette(), panel = panel.2dsmoother, args = list (span = 0.05))

Interpolation isn't available as readily, as the interpolation functions do not follow the model - predict paradigm.
=>

• either wrap interpolation into model + prediction

• or derive panel.2dsmoother analogue that works with interpolation functions.

• add smoothing explanation to plotting vignette

• add interpolation to plotting vignette

• add smoothing explanation to chondro vignette