# Calculate a lattice projection to/from an `inla.mesh`

for
rSPDE objects

Source: `R/inla_rspde.R`

`rspde.mesh.project.Rd`

Calculate a lattice projection to/from an `inla.mesh`

for
rSPDE objects

## Usage

```
rspde.mesh.project(...)
rspde.mesh.projector(
mesh,
nu = NULL,
rspde_order = 2,
loc = NULL,
lattice = NULL,
xlim = NULL,
ylim = NULL,
dims = c(100, 100),
projection = NULL,
...
)
# S3 method for inla.mesh
rspde.mesh.project(
mesh,
loc = NULL,
field = NULL,
rspde_order = 2,
nu = NULL,
...
)
# S3 method for rspde.mesh.projector
rspde.mesh.project(projector, field, ...)
# S3 method for inla.mesh.1d
rspde.mesh.project(mesh, loc, field = NULL, rspde_order = 2, nu = NULL, ...)
```

## Arguments

- ...
Additional parameters.

- mesh
An

`inla.mesh`

or`inla.mesh.1d`

object.- nu
The smoothness parameter. If

`NULL`

, it will be assumed that nu was estimated.- rspde_order
The order of the rational approximation.

- loc
Projection locations. Can be a matrix or a SpatialPoints or a SpatialPointsDataFrame object.

- lattice
An

`inla.mesh.lattice`

object.- 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.

- dims
Lattice dimensions.

- projection
One of c("default", "longlat", "longsinlat", "mollweide").

- field
Basis function weights, one per mesh basis function, describing the function to be evaluated at the projection locations.

- projector
A

`rspde.mesh.projector`

object.