ana: Flow anamorphosis transform Compute a transformation that...

In gmGeostats: Geostatistics for Compositional Analysis

Flow anamorphosis transform Compute a transformation that gaussianizes a certain data set

Description

Flow anamorphosis transform Compute a transformation that gaussianizes a certain data set

Usage

ana(Y, sigma0 = 0.1, sigma1 = 1, steps = 30, sphere = TRUE, weights = NULL)

Arguments

Y	data set defining the gaussianization
sigma0	starting spread of the kernels
sigma1	final spread of the kernels
steps	number of steps to linearize the transform (default 30 is good)
sphere	boolean, should the transform include a spherifization step, making Y spherical?
weights	weights to incorporate in the compuations, length=nrow(Y)

Value

a function with arguments (x, inv=FALSE), where x will be the data to apply the transformation to, and inv=FALSE will indicate if the direct or the inverse transformation is desired

Author(s)

K. Gerald van den Boogaart

See Also

anaForward, anaBackward, sphTrans

Examples

library(compositions)
data("jura", package="gstat")
Y = acomp(jura.pred[,c(10,12,13)])
plot(Y)
anafun = ana(Y)
class(anafun)
z = anafun(Y)
plot(z)
y = anafun(z, inv=TRUE)
plot(data.frame(orig=Y,recalc=y))

gmGeostats documentation built on April 18, 2023, 5:08 p.m.