fm_evaluate | R Documentation |
Calculate evaluation information and/or evaluate a function defined on a mesh or function space.
fm_evaluate(...)
## Default S3 method:
fm_evaluate(mesh, field, ...)
## S3 method for class 'fm_evaluator'
fm_evaluate(projector, field, ...)
## S3 method for class 'fm_basis'
fm_evaluate(basis, field, ...)
fm_evaluator(...)
## Default S3 method:
fm_evaluator(...)
## S3 method for class 'fm_mesh_3d'
fm_evaluator(mesh, loc = NULL, lattice = NULL, dims = NULL, ...)
## S3 method for class 'fm_mesh_2d'
fm_evaluator(mesh, loc = NULL, lattice = NULL, crs = NULL, ...)
## S3 method for class 'fm_mesh_1d'
fm_evaluator(mesh, loc = NULL, xlim = mesh$interval, dims = 100, ...)
fm_evaluator_lattice(mesh, ...)
## Default S3 method:
fm_evaluator_lattice(mesh, dims = 100, ...)
## S3 method for class 'fm_bbox'
fm_evaluator_lattice(mesh, dims = 100, ...)
## S3 method for class 'fm_mesh_2d'
fm_evaluator_lattice(
mesh,
xlim = NULL,
ylim = NULL,
dims = c(100, 100),
projection = NULL,
crs = NULL,
...
)
... |
Additional arguments passed on to methods. |
mesh |
An fm_mesh_1d, fm_mesh_2d, or other object supported by a sub-method. |
field |
Basis function weights, one per mesh basis function, describing the function to be evaluated at the projection locations |
projector |
An |
basis |
An fm_basis object. |
loc |
Projection locations. Can be a matrix, |
lattice |
An |
dims |
Lattice dimensions. |
crs |
An optional CRS or inla.CRS object associated with |
xlim |
X-axis limits for a lattice. For R2 meshes, defaults to covering the domain. |
ylim |
Y-axis limits for a lattice. For R2 meshes, defaults to covering the domain. |
projection |
One of |
A vector or matrix of the evaluated function
An fm_evaluator
object
fm_evaluate(default)
: The default method calls
proj = fm_evaluator(mesh, ...)
, followed by fm_evaluate(proj, field)
.
fm_evaluate()
: Returns the field function evaluated at the locations determined by an
fm_evaluator
object. fm_evaluate(mesh, field = field, ...)
is a
shortcut to fm_evaluate(fm_evaluator(mesh, ...), field = field)
.
fm_evaluator()
: Returns an fm_evaluator
list object with evaluation information.
The proj
element is a fm_basis
object, containing (at least)
a mapping matrix A
and a logical vector ok
, that indicates which
locations were mappable to the input mesh.
For fm_mesh_2d
input, proj
also contains a bary
fm_bary object, with the
barycentric coordinates within the triangle each input location falls in.
fm_evaluator(default)
: The default method calls fm_basis
and creates
a basic fm_evaluator
object
fm_evaluator(fm_mesh_3d)
: The ...
arguments are passed on to
fm_evaluator_lattice()
if no loc
or lattice
is provided.
fm_evaluator(fm_mesh_2d)
: The ...
arguments are passed on to
fm_evaluator_lattice()
if no loc
or lattice
is provided.
fm_evaluator_lattice()
: Create a lattice object by default covering the input mesh.
fm_evaluator_lattice(default)
: Creates an fm_lattice_2d()
object, by default covering the input mesh.
fm_evaluator_lattice(fm_bbox)
: Creates an fm_lattice_Nd()
object, by default covering the input mesh.
fm_evaluator_lattice(fm_mesh_2d)
: Creates an fm_lattice_2d()
object, by default covering the input mesh.
Finn Lindgren finn.lindgren@gmail.com
fm_mesh_2d()
, fm_mesh_1d()
,
fm_lattice_2d()
if (TRUE) {
n <- 20
loc <- matrix(runif(n * 2), n, 2)
mesh <- fm_rcdt_2d_inla(loc, refine = list(max.edge = 0.05))
proj <- fm_evaluator(mesh)
field <- cos(mesh$loc[, 1] * 2 * pi * 3) * sin(mesh$loc[, 2] * 2 * pi * 7)
image(proj$x, proj$y, fm_evaluate(proj, field))
}
# if (require("ggplot2") &&
# require("ggpolypath")) {
# ggplot() +
# gg(data = fm_as_sfc(mesh), col = field)
# }
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