vec2dtransf (version 1.1)

SimilarityTransformation: Create an SimilarityTransformation object

Description

Creates objects of class SimilarityTransformation from control points or directly from parameters

Usage

SimilarityTransformation(controlPoints = data.frame(), 
parameters = numeric())

Arguments

controlPoints

data.frame containing control point coordinates arranged in four (4) columns: X source, Y source, X target, Y target.

parameters

A vector of four (4) parameters for representing the transformation, namely: a, b, c and d, where x' = ax + by + c y' = ay - bx + d

Value

Object of the class SimilarityTransformation

Details

Both controlPoints and parameters are optional, but one has to be given. In the case of the latter, the name of the argument has to be specified, e.g., SimilarityTransformation(parameters=c(1,2,3,4))

See Also

SimilarityTransformation-class

Examples

# NOT RUN {
st <- SimilarityTransformation(parameters=c(1,2,3,4))
# }