wrappers | R Documentation |
These functions are wrappers for some (but not all)
the C functions
included in the geoR package.
Typically the C code is directly called from the geoR
functions but these functions allows independent calls.
diffpairs(coords, data) loccoords(coords, locations) .diagquadraticformXAX(X, lowerA, diagA) .bilinearformXAY(X, lowerA, diagA, Y) .corr.diaglowertri(coords, cov.model, phi, kappa) .Ccor.spatial(x, phi, kappa, cov.model)
coords |
an n x 2 matrix with the data coordinates. |
data |
an vector with the data values. |
locations |
an N x 2 matrix with the coordinates of the prediction locations. |
lowerA |
a vector with the diagonal terms of the symmetric matrix A. |
diagA |
a vector with the diagonal terms of the symmetric matrix A. |
X |
a matrix with conforming dimensions. |
Y |
a matrix with conforming dimensions. |
cov.model |
covariance model, see |
phi |
numerical value of the correlation function parameter phi. |
kappa |
numerical value of the correlation function parameter kappa. |
x |
a vector of distances. |
The outputs for the different functions are:
diffpairs |
returns a list with elements |
loccoords |
returns a n x N matrix with distances between data points and prediction locations. |
diagquadraticformXAX |
returns a vector with the diagonal term of the quadratic form t(X) %*% A %*% X. |
bilinearformXAY |
returns a vector or a matrix with the terms of the quadratic form t(X) %*% A %*% Y. |
corr.diaglowertri |
returns the lower triangle of the correlation matrix, including the diagonal. |
Ccor.spatial |
returns a vector of values of spatial correlations. |
Paulo Justiniano Ribeiro Jr. paulojus@leg.ufpr.br,
Peter J. Diggle p.diggle@lancaster.ac.uk.
Further information on the package geoR can be found at:
http://www.leg.ufpr.br/geoR/.
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