corr.gc | R Documentation |
Class of isotropic correlation functions available in the gcKrig
library.
By default, range parameter is not provided, so
this function is used for likelihood inference and spatial prediction with function mlegc
and predgc
.
Users need to specify if the correlation model includes a nugget effect
nugget = TRUE
or not nugget = FALSE
. For Matern and powered exponential correlation functions, the
shape parameter kappa
is also required from users.
When both range and nugget parameters are given,
the function is used to specify the correlation structure in simulation
with function simgc
in package gcKrig
.
At the moment, the following three correlation functins are implemented:
matern.gc | the Matern correlation function. |
powerexp.gc | the powered exponential correlation function. |
spherical.gc | the spherical correlation function. |
Zifei Han hanzifei1@gmail.com
De Oliveira, V. (2013) Hierarchical Poisson models for spatial count data. Journal of Multivariate Analysis,122:393-408.
Han, Z. and De Oliveira, V. (2018) gcKrig: An R Package for the Analysis of Geostatistical Count Data Using Gaussian Copulas. Journal of Statistical Software, 87(13), 1–32. doi: 10.18637/jss.v087.i13.
matern.gc
,
powerexp.gc
,
spherical.gc
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