geoR (version 1.5-6)

wrappers: Wrappers for the C functions used in geoR

Description

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.

Usage

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)

Arguments

coords

an $n \times 2$ matrix with the data coordinates.

data

an vector with the data values.

locations

an $N \times 2$ 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 cov.spatial for options and more details.

phi

numerical value of the correlation function parameter phi.

kappa

numerical value of the correlation function parameter kappa.

x

a vector of distances.

Value

• The outputs for the different functions are:
• loccoords
  returns a $n \times N$ matrix with distances between data points and prediction locations.
• diagquadraticformXAX
  returns a vector with the diagonal term of the quadratic form $X' A X$.
• bilinearformXAY
  returns a vector or a matrix with the terms of the quadratic form $X' A Y$.
• corr.diaglowertri
  returns the lower triangle of the correlation matrix, including the diagonal.
• Ccor.spatial
  returns a vector of values of spatial correlations.

References

Further information on the package geoR can be found at: http://www.est.ufpr.br/geoR.