| cmod.man {gear} | R Documentation |
Standard covariance models for geostatistical data.
Description
cmod.man manually creates a covariance matrix
object (cmodMan) for geostatistical data. This
function will be deprecated in the future. Please update
your code to use the cmod_man
function.
Usage
cmod.man(v, evar = 0)
Arguments
v |
The covariance matrix of the observed data, including any errors. The matrix should be square, symmetric, and positive definite, though that latter two conditions are not checked. |
evar |
The variance of the errors. Must be non-negative number. The default is 0. |
Details
Note that v includes the error variance, i.e.,
v = vz + ve, where vz is the covariance
matrix of the filtered process and the variance matrix
of the errors is ve = diag(evar/weights), where
the weights come from the geolm object the
cmodMan object is associated with.
Value
Returns a cmodMan object.
Author(s)
Joshua French
Examples
coords = matrix(runif(20), ncol = 2)
d = as.matrix(dist(coords))
cmod.man(v = exp(-d), evar = 1)