variograms: Variogram functions

Description Usage Arguments Details Value Author(s) References See Also Examples

Description

Valid scalar variogram model functions.

Usage

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vgram.sph( h , nugget = 0, sill = 1, range= 1,... )
vgram.exp( h , nugget = 0, sill = 1, range= 1,... )
vgram.gauss( h , nugget = 0, sill = 1, range= 1,... )
vgram.lin( h , nugget = 0, sill = 1, range= 1,... )
vgram.pow( h , nugget = 0, sill = 1, range= 1,... )
vgram.nugget( h , nugget = 1,...,tol=1E-8 )

Arguments

h

a vector providing distances, a matrix of distance vectors in its rows or a data.frame of distance vectors.

nugget

The size of the nugget effect (i.e. the limit to 0). At zero itself the value is always 0.

sill

The sill (i.e. the limit to infinity)

range

The range parameter. I.e. the distance in which sill is reached or if this does not exist, where the value is in some sense nearly the sill.

...

not used

tol

The distance that is considered as nonzero.

Details

The univariate variograms are used in the CompLinCoReg as building blocks of multivariate variogram models.

Value

A vector of size NROW(h), giving the variogram values.

Author(s)

K.Gerald v.d. Boogaart http://www.stat.boogaart.de

References

Cressie, N.C. (1993) Spatial statistics

Tolosana, van den Boogaart, Pawlowsky-Glahn (2009) Estimating and modeling variograms of compositional data with occasional missing variables in R, StatGis09

See Also

vgram2lrvgram, CompLinModCoReg, vgmFit

Examples

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## Not run: 
data(juraset)
X <- with(juraset,cbind(X,Y))
comp <- acomp(juraset,c("Cd","Cu","Pb","Co","Cr"))
lrv <- logratioVariogram(comp,X,maxdist=1,nbins=10)
plot(lrv)

## End(Not run)

Example output

Loading required package: tensorA

Attaching package: 'tensorA'

The following object is masked from 'package:base':

    norm

Loading required package: robustbase
Loading required package: energy
Loading required package: bayesm
Welcome to compositions, a package for compositional data analysis.
Find an intro with "? compositions"


Attaching package: 'compositions'

The following objects are masked from 'package:stats':

    cor, cov, dist, var

The following objects are masked from 'package:base':

    %*%, scale, scale.default

Warning message:
In structure(c(), class = c(class(x), class(y))) :
  Calling 'structure(NULL, *)' is deprecated, as NULL cannot have attributes.
  Consider 'structure(list(), *)' instead.

compositions documentation built on May 30, 2017, 3:25 a.m.