.Q | R Documentation |
This creates the precision matrix from a mesh created by R-INLA with a specified range. This is currently set up to support the standard spde approach of precision matrices and the barrier model version. Similar in purpose to .sp_covar.
.Q(
mesh,
barrier.triangles,
range = 50,
range_fraction = 0.2,
sigma_u = 1,
model = "spde"
)
mesh |
The mesh created by R-INLA representing spatial area |
barrier.triangles |
the list of triangles of the mesh in the barrier, only used for barrier model |
range |
decorrelation range |
range_fraction |
the fraction that sets the range over the "land" parts of the barrier model. Only used with the barrier model |
sigma_u |
the overall variance of the spatial process |
model |
'spde' for the SPDE approach, 'barrier' for barrier approach |
Q a sparse precision matrix of type dgTMatrix
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