| covs.test | Covariate test function for the horseshoe domain | 
| create.FEM.basis | Create a FEM basis | 
| create.mesh.1.5D | Create a 1.5D linear network mesh | 
| create.mesh.2.5D | Create a 'mesh.2.5D' object from the nodes locations and the connectivity matrix | 
| create.MESH.2D | Deprecated Functions | 
| create.mesh.2D | Create a 2D triangular mesh | 
| create.mesh.3D | Create a 'mesh.3D' object from the connectivity matrix and nodes locations | 
| DE.FEM | Nonparametric density estimation with differential regularization | 
| DE.FEM.time | Nonparametric spatio-temporal density estimation with differential regularization | 
| DE.heat.FEM | Density initialization | 
| DE.heat.FEM.time | Spatio-temporal density initialization | 
| eval.FEM | Evaluate a FEM object at a set of point locations | 
| eval.FEM.time | Evaluate a FEM.time object at a set of point locations | 
| fdaPDE-deprecated | Deprecated Functions | 
| FEM | Define a surface or spatial field by a Finite Element basis expansion | 
| FEM.time | Define a spatio-temporal field by a Finite Element basis expansion | 
| FPCA.FEM | Smooth Functional Principal Component Analysis | 
| fs.test | FELSPLINE test function | 
| fs.test.3D | FELSPLINE 3D test function | 
| horseshoe2.5D | Horseshoe2.5D domain | 
| horseshoe2D | Horseshoe domain | 
| hub2.5D | Hub domain | 
| image.FEM | Image Plot of a 2D FEM object | 
| image.FEM.time | Image plot of a 2D FEM.time object at a given time | 
| inferenceDataObject | Class for inference data | 
| inferenceDataObject-class | Class for inference data | 
| inferenceDataObjectBuilder | Constructor for inferenceDataObject class | 
| inferenceDataObjectTime | Class for inference data in ST case | 
| inferenceDataObjectTime-class | Class for inference data in ST case | 
| inferenceDataObjectTimeBuilder | Constructor for inferenceDataObjectTime class | 
| plot.FEM | Plot a 'FEM' object | 
| plot.FEM.time | Plot a 'FEM.time' object at a given time | 
| plot.mesh.1.5D | Plot a mesh.1.5D object | 
| plot.mesh.2.5D | Plot a mesh.2.5D object | 
| plot.mesh.2D | Plot a mesh.2D object | 
| plot.mesh.3D | Plot a mesh.3D object | 
| plot.MESH2D | Deprecated Functions | 
| projection.points.1.5D | Project 2D points onto 1.5D linear network mesh | 
| projection.points.2.5D | Project 3D points onto 2D 2.5D triangular mesh | 
| quasicircle2D | Quasicircle2D domain | 
| quasicircle2Dareal | Quasicircle2Dareal domain | 
| refine.by.splitting.mesh.1.5D | Create a 'mesh.1.5D' object by splitting each edge of a given mesh into two subedges. | 
| refine.by.splitting.mesh.2.5D | Create a 'mesh.2.5D' object by splitting each triangle of a given mesh into four subtriangles. | 
| refine.by.splitting.mesh.2D | Create a 'mesh.2D' object by splitting each triangle of a given mesh into four subtriangles. | 
| refine.by.splitting.mesh.3D | Create a 'mesh.3D' object by splitting each tetrahedron of a given mesh into eight subtetrahedrons. | 
| refine.mesh.1.5D | Refine 1.5D mesh | 
| refine.MESH.2D | Deprecated Functions | 
| refine.mesh.2D | Refine a 2D triangular mesh | 
| R_eval.FEM | Deprecated Functions | 
| R_eval.FEM.basis | Deprecated Functions | 
| R_mass | Deprecated Functions | 
| R_smooth.FEM.basis | Deprecated Functions | 
| R_stiff | Deprecated Functions | 
| smooth.FEM | Spatial regression with differential regularization | 
| smooth.FEM.basis | Deprecated Functions | 
| smooth.FEM.PDE.basis | Deprecated Functions | 
| smooth.FEM.PDE.sv.basis | Deprecated Functions | 
| smooth.FEM.time | Space-time regression with differential regularization | 
| sphere3Ddata | Sphere3Ddata |