show_basis function

Show basis functions

Generic plotting function for visualising the basis functions.

show_basis(basis, ...)

## S4 method for signature 'Basis'
show_basis(basis, g = ggplot() + theme_bw() + xlab("") + ylab(""))

## S4 method for signature 'TensorP_Basis'
show_basis(basis, g = ggplot())

Arguments

• basis: object of class Basis
• ...: not in use
• g: object of class gg (a ggplot object) over which to overlay the basis functions (optional)

Details

The function show_basis adapts its behaviour to the manifold being used. With real_line, the 1D basis functions are plotted with colour distinguishing between the different resolutions. With plane, only local basis functions are supported (at present). Each basis function is shown as a circle with diameter equal to the scale parameter of the function. Linetype distinguishes the resolution. With sphere, the centres of the basis functions are shown as circles, with larger sizes corresponding to coarser resolutions. Space-time basis functions of subclass TensorP_Basis are visualised by showing the spatial basis functions and the temporal basis functions in two separate plots.

Examples

library(ggplot2)
library(sp)
data(meuse)
coordinates(meuse) = ~x+y # change into an sp object
G <- auto_basis(manifold = plane(),data=meuse,nres = 2,regular=2,prune=0.1,type = "bisquare")
## Not run: show_basis(G,ggplot()) + geom_point(data=data.frame(meuse),aes(x,y))

See Also

auto_basis for automatically constructing basis functions.