R: Variant of the exponential model

RMqexp {RandomFields} | R Documentation

## Variant of the exponential model

### Description

The covariance function is

C(x)= ( 2 e^{-x} - α e^{-2x} ) / ( 2 - α )

### Usage

    RMqexp(alpha, var, scale, Aniso, proj)

### Arguments

`alpha` | value in [0,1]
`var,scale,Aniso,proj` | optional arguments; same meaning for any `RMmodel`. If not passed, the above covariance function remains unmodified.

### Value

`RMqexp` returns an object of class `RMmodel`

### Author(s)

Martin Schlather, schlather@math.uni-mannheim.de

### References

- ?

### See Also

`RMmodel`,

### Examples

    RFoptions(seed=0) ## *ANY* simulation will have the random seed 0; set
    ##                   RFoptions(seed=NA) to make them all random again

    model <- RMqexp(alpha=0.95, scale=0.2)
    x <- seq(0, 10, 0.02)
    plot(model)
    plot(RFsimulate(model, x=x))

[Package RandomFields version 3.1.50 Index]