comp_mat_cov {smile} | R Documentation |
Matern covariance function for a polygons.
Description
Computing the Matern covariance function between polygons.
Usage
comp_mat_cov(cross_dists, n, n2, sigsq, phi, nu)
Arguments
cross_dists |
a list such that each position contains the cross
distances between points within different polygons.
|
n |
an integer representing number of polygons (note that, this is
different than the size of the list cross_dists
|
n2 |
usually, equal to n , except when the function is being used
to calculate the "cross" covariance between two different partitions of
the same space.
|
sigsq |
the \sigma^2 parameter from the Matern covariance
function.
|
phi |
the \phi parameter from the Matern covariance function,
controls the range of the spatial dependence.
|
nu |
the \nu parameter from the Matern covariance function,
controls the differentiability of the process. Note that, if we set
nu = .5 , then the calculations are based on the exponential
covariance function.
|
Value
The matern covariance matrix associated with a set of polygons.
See Also
single_exp
, single_matern
,
mat_cov
[Package
smile version 1.0.5
Index]