Image plot of a
FEM object, generated by the function
FEM or returned by
FPCA.FEM. Only FEM objects defined over a 2D mesh can be plotted with this method.
## S3 method for class 'FEM' image(x, num_refinements, ...)
A natural number specifying how many bisections should by applied to each triangular element for plotting purposes. This functionality is useful where a discretization with 2nd order Finite Element is applied.
Arguments representing graphical options to be passed to plot3d.
library(fdaPDE) ## Upload the horseshoe2D data data(horseshoe2D) boundary_nodes = horseshoe2D$boundary_nodes boundary_segments = horseshoe2D$boundary_segments locations = horseshoe2D$locations ## Create the 2D mesh mesh = create.mesh.2D(nodes = rbind(boundary_nodes, locations), segments = boundary_segments) ## Create the FEM basis FEMbasis = create.FEM.basis(mesh) ## Compute the coeff vector evaluating the desired function at the mesh nodes ## In this case we consider the fs.test() function introduced by Wood et al. 2008 coeff = fs.test(mesh$nodes[,1], mesh$nodes[,2]) ## Create the FEM object FEMfunction = FEM(coeff, FEMbasis) ## Plot the FEM function image(FEMfunction)
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