methodParameters: generate string for generation of method parameters

In jskoien/intamap: Procedures for Automated Interpolation

Description

function that generates a parsable string of identified method parameters for an intamap interpolation object

Usage

## Default S3 method:
methodParameters(object)
## S3 method for class 'copula'
methodParameters(object)
## S3 method for class 'idw'
methodParameters(object)

Arguments

object

a list object. Most arguments necessary for interpolation are passed through this object. See intamap-package for further description of the necessary content of this variable

Details

The function creates a text-string that makes it possible to add the the method parameters (anisotropy and idw-parameter, variogram model or copula parameters) to the object in a later call to createIntamapObject or interpolate without having to re-estimate the parameters. This function is particularly useful when interpolate is called from a Web Processing Service, and the user wants to reuse the method parameters. The function is mainly assumed to be called from within interpolate.

The default method assumes a variogram model of gstat type, e.g. a variogram similar to what can be created with a call to vgm. Also psgp uses this variogram model.

Value

A string that, when parsed, will recreate the methodParameters

Author(s)

Jon Olav Skoien

References

Pebesma, E., Cornford, D., Dubois, G., Heuvelink, G.B.M., Hristopulos, D., Pilz, J., Stohlker, U., Morin, G., Skoien, J.O. INTAMAP: The design and implementation f an interoperable automated interpolation Web Service. Computers and Geosciences 37 (3), 2011.

Examples

data(meuse)
coordinates(meuse) = ~x+y
meuse$value = log(meuse$zinc)
# set up intamap object:
krigingObject = createIntamapObject(
		observations = meuse,
		formulaString = as.formula('value~1'),class = "automap")
# do estimation steps:
krigingObject = estimateParameters(krigingObject)
krigingObject = methodParameters(krigingObject)

# Create a new object
krigingObject2 = createIntamapObject(observations = meuse,
		formulaString = as.formula('value~1'),
    params = list(methodParameters = krigingObject$methodParameters))

krigingObject$variogramModel
krigingObject2$variogramModel

jskoien/intamap documentation built on May 27, 2019, 7:26 a.m.