The gstat Package - NexTag Supports Open Source Initiatives

More documents

Recommendations

Info

8 get.contrSee Alsoncp.gridExamplesdata(fulmar)summary(fulmar)get.contrCalculate contrasts from multivariable predictionsDescriptionUsageGiven multivariable predictions and prediction (co)variances, calculate contrasts and their (co)varianceArgumentsget.contr(data, gstat.object, X, ids = names(gstat.object$data))datadata frame, output of predict.gstatgstat.object object of class gstat, used to extract ids; may be missing if ids is usedXidsDetailsValuecontrast vector or matrix; the number of variables in gstat.object shouldequal the number of elements in X if X is a vector, or the number of rows in X ifX is a matrix.character vector with (selection of) id names, present in dataFrom data, we can extract the (n × 1) vector with multivariable predictions, say y, and its (n × n)covariance matrix V . Given a contrast matrix in X, this function computes the contrast vector isC = X ′ y and V ar(C) = X ′ V X.a data frame containing for each row in data the generalized least squares estimates (named beta.1,beta.2, ...), their variances (named var.beta.1, var.beta.2, ...) and covariances (named cov.beta.1.2,cov.beta.1.3, ...)Author(s)Edzer J. PebesmaReferenceshttp://www.gstat.org/
gstat-internal 9See Alsopredict.gstatgstat-internalGstat Internal FunctionsDescriptiongstat internal functionsNotethese functions are not meant to be called by users directlyAuthor(s)Edzer J. PebesmagstatCreate gstat objects, or subset itDescriptionFunction that creates gstat objects; objects that hold all the information necessary for univariate ormultivariate geostatistical prediction (simple, ordinary or universal (co)kriging), or its conditionalor unconditional Gaussian or indicator simulation equivalents. Multivariate gstat object can besubsetted.Usagegstat(g, id, formula, locations, data, model = NULL, beta, nmax = Inf,nmin = 0, maxdist = Inf, dummy = FALSE, set, fill.all = FALSE,fill.cross = TRUE, variance = "identity", weights = NULL, merge,degree = 0)## S3 method for class 'gstat':print(x, ...)
Page 1 and 2: The gstat PackageMarch 12, 2008Vers
Page 3 and 4: fit.lmc 3ReferencesN.A.C. Cressie,
Page 5 and 6: fit.variogram 5fit.rangesfit.method
Page 7: fulmar 7Author(s)Edzer J. PebesmaRe
Page 11 and 12: gstat 11DetailsValuevarianceweights
Page 13 and 14: hscat 13# and the manuals for predi
Page 15 and 16: jura 15so by extending the image to
Page 17 and 18: krige 17jura.pred$Rock = factor(pre
Page 19 and 20: krige 19Valuea data frame containin
Page 21 and 22: krige.cv 21formulalocationsdatamode
Page 23 and 24: map.to.lev 23map.to.levrearrange da
Page 25 and 26: meuse.alt 25Examplesdata(meuse.all)
Page 27 and 28: ossfim 27ossfimKriging standard err
Page 29 and 30: oxford 29FormatNoteThis data frame
Page 31 and 32: plot.gstatVariogram 31Examplesdata(
Page 33 and 34: plot.pointPairs 33g = gstat(NULL, "
Page 35 and 36: plot.variogramCloud 35Valuexlimylim
Page 37 and 38: predict.gstat 37Detailsna.actionsps
Page 39 and 40: show.vgms 39v
Page 41 and 42: sic2004 41Examplesshow.vgms()show.v
Page 43 and 44: spplot.vcov 43Examplesdata(sic2004)
Page 45 and 46: variogram 45cutoffwidthalphabetatol
Page 47 and 48: variogramLine 47variogram(log(zinc)
Page 49 and 50: vgm 49add.toanisxa variogram model
Page 51 and 52: vgm.panel.xyplot 51Usagevgm.panel.x
Page 53 and 54: walker 53ReferencesApplied Geostati
Page 55: INDEX 55krige,formula,Spatial-metho

The gstat Package - NexTag Supports Open Source Initiatives

Create successful ePaper yourself

Delete template?

Save as template?