This function defines a FEM object.
A vector or a matrix containing the coefficients for the Finite Element basis expansion. The number of rows
(or the vector's length) corresponds to the number of basis in
FEM object. This contains a list with components
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
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 it plot(FEMfunction)
Loading required package: geometry Loading required package: rgl Loading required package: Matrix Loading required package: plot3D Loading required package: plot3Drgl Warning messages: 1: In rgl.init(initValue, onlyNULL) : RGL: unable to open X11 display 2: 'rgl.init' failed, running with 'rgl.useNULL = TRUE'. 3: no DISPLAY variable so Tk is not available
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