Function reference • fmesher

Mesh construction

Functions for contructing meshes and function spaces.

fm_mesh_1d(): Make a 1D mesh object

fm_mesh_2d() fm_mesh_2d_inla(): Make a 2D mesh object

fm_rcdt_2d() fm_rcdt_2d_inla() fm_delaunay_2d(): Refined Constrained Delaunay Triangulation

fm_lattice_2d(): Make a lattice object

fm_segm() fm_segm_join() fm_segm_split() fm_is_bnd() `fm_is_bnd<-`(): Make a spatial segment object

c(<fm_segm>) c(<fm_segm_list>) `[`(<fm_segm_list>): Methods for fm_segm lists

fm_nonconvex_hull() fm_extensions(): Compute an extension of a spatial object

fm_nonconvex_hull_inla() fm_nonconvex_hull_inla_basic(): Non-convex hull computation

fm_simplify(): Recursive curve simplification.

fm_tensor(): Make a tensor product function space

fm_split_lines(): Split lines at triangle edges

Property methods

Functions for computing or accessing object properties

fm_basis(): Compute mapping matrix between mesh function space and points

fm_raw_basis(): Basis functions for mesh manifolds

fm_int(): Multi-domain integration

fm_bary(): Compute barycentric coordinates

fm_evaluate() fm_evaluator() fm_evaluator_lattice(): Methods for projecting to/from mesh objects

fm_diameter(): Diameter bound for a geometric object

fm_bbox() fm_as_bbox() `[`(<fm_bbox>) c(<fm_bbox>): Bounding box class

fm_vertices(): Extract vertex locations from an fm_mesh_2d

fm_centroids(): Extract triangle centroids from an fm_mesh_2d

fm_contains(): Check which mesh triangles are inside a polygon

fm_is_within(): Query if points are inside a mesh

fm_manifold() fm_manifold_type() fm_manifold_dim(): Query the mesh manifold type

fm_detect_manifold() fm_crs_detect_manifold(): Detect manifold type

fm_dof(): Function spece degrees of freedom

fm_pixels(): Generate lattice points covering a mesh

Stochastic process methods

Functions for constructing stochastic PDE models

fm_fem(): Compute finite element matrices

fm_matern_precision() fm_matern_sample() fm_covariance() fm_sample(): SPDE, GMRF, and Matérn process methods

Matrix helper functions

Functions for handling matrix constructions

fm_block() fm_block_eval() fm_block_logsumexp_eval() fm_block_weights() fm_block_log_weights() fm_block_log_shift() fm_block_prep(): Blockwise aggregation matrices

fm_row_kron(): Row-wise Kronecker products

Coordinate system tools

Functions for handling coordinate systems and conversions

`fm_crs<-`() `fm_crs_oblique<-`(): Assignment operators for crs information objects

fm_crs() fm_crs_oblique() st_crs(<fm_crs>) `$`(<fm_crs>) fm_CRS(<fm_list>) fm_wkt_predef(): Obtain coordinate reference system object

fm_crs_is_identical() fm_identical_CRS(): Check if two CRS objects are identical

fm_crs_is_null() is.na(<fm_crs>): Check if a crs is NULL or NA

fm_wkt_is_geocent() fm_crs_is_geocent() fm_wkt_get_ellipsoid_radius() fm_crs_get_ellipsoid_radius() fm_ellipsoid_radius() fm_wkt_set_ellipsoid_radius() `fm_ellipsoid_radius<-`() fm_crs_set_ellipsoid_radius() fm_wkt_unit_params() fm_wkt_get_lengthunit() fm_wkt_set_lengthunit() fm_crs_get_lengthunit() fm_crs_set_lengthunit() fm_length_unit() `fm_length_unit<-`() fm_wkt() fm_proj4string() fm_crs_get_wkt() fm_wkt_tree_projection_type() fm_wkt_projection_type() fm_crs_projection_type() fm_crs_bounds(): Handling CRS/WKT

fm_detect_manifold() fm_crs_detect_manifold(): Detect manifold type

fm_transform(): Object coordinate transformation

fm_CRS() is.na(<fm_CRS>) is.na(<inla.CRS>): Create a coordinate reference system object

Conversion to fmesher classes

Functions for converting non-fmesher objects to fmesher objects.

fm_as_fm(): Convert objects to fmesher objects

fm_as_lattice_2d() fm_as_lattice_2d_list(): Convert objects to fm_lattice_2d

fm_as_mesh_1d() fm_as_mesh_1d_list(): Convert objects to fm_segm

fm_as_mesh_2d() fm_as_mesh_2d_list(): Convert objects to fm_mesh_2d

fm_as_segm() fm_as_segm_list(): Convert objects to fm_segm

fm_as_sfc(): Conversion methods from mesh related objects to sfc

fm_as_tensor() fm_as_tensor_list(): Convert objects to fm_tensor

fm_bbox() fm_as_bbox() `[`(<fm_bbox>) c(<fm_bbox>): Bounding box class

fm_list() fm_as_list() c(<fm_list>) `[`(<fm_list>): Handle lists of fmesher objects

fm_spTransform() fm_has_PROJ6() fm_not_for_PROJ6() fm_not_for_PROJ4() fm_fallback_PROJ6() fm_requires_PROJ6() fm_as_sp_crs() fm_sp_get_crs() fm_as_inla_mesh_segment() fm_as_inla_mesh() fm_sp2segment(): Deprecated functions in fmesher

Plotting methods

Functions for plotting.

geom_fm(): ggplot2 geomes for fmesher related objects

lines(<fm_mesh_2d>) plot(<fm_mesh_2d>): Draw a triangulation mesh object

plot(<fm_segm>) lines(<fm_segm>) plot(<fm_segm_list>) lines(<fm_segm_list>): Draw fm_segm objects.

plot_globeproj(): Plot a globeproj object

plot_rgl() lines_rgl(): Low level triangulation mesh plotting

Printing methods

Functions for printing.

print(<fm_segm>) print(<fm_segm_list>) print(<fm_mesh_2d>) print(<fm_mesh_1d>) print(<fm_bbox>) print(<fm_crs>) print(<fm_CRS>): Print objects

Data objects

fmexample: Example mesh data

Direct C++ interface

Direct C++ interface methods, not intended for package users.

fmesher_bary(): Barycentric coordinate computation

fmesher_fem(): Finite element matrix computation

fmesher_globe_points(): Globe points

fmesher_rcdt(): Refined Constrained Delaunay Triangulation

fmesher_split_lines(): Split lines at triangle edges

fmesher_subdivide(): Split triangles

Deprecated methods

fm_spTransform() fm_has_PROJ6() fm_not_for_PROJ6() fm_not_for_PROJ4() fm_fallback_PROJ6() fm_requires_PROJ6() fm_as_sp_crs() fm_sp_get_crs() fm_as_inla_mesh_segment() fm_as_inla_mesh() fm_sp2segment(): Deprecated functions in fmesher