utility (version 1.4.6)

utility.conversion.intpol.create: Construct an interpolation conversion node

Description

Function to construct a node converting values into utilities by interpolation.

Usage

utility.conversion.intpol.create(name.node, 
                                 node, 
                                 x, 
                                 u, 
                                 names.x      = rep(NA, length(x)), 
                                 names.u      = rep(NA, length(u)), 
                                 required     = FALSE, 
                                 col          = "black", 
                                 shift.levels = 0)

Value

The function returns the created object of type utility.conversion.intpol1 with the properties specified in the arguments of the function.

Arguments

name.node

name of the node to be constructed as a character string.

node

value node that is to be converted into a utility node.

x

numeric vector of values for which the utility is known.

u

numeric vector of utilities corresponding to the values given in the previous argument x.

names.x

(optional) vector of character strings with names of the components of the numeric vector x specified above. Only required to provide access to the values through a named parameter vector.

names.u

(optional) vector of character strings with names of the components of the numeric vector u specified above. Only required to provide acces through a named parameter vector.

required

(optional) logical variable indicating if the value of this node is required for aggregation at the next higher level. If this variable is TRUE, aggregation at the next higher level is not possible if this node returns NA. Default value is FALSE.

col

(optional) color used for plotting the bounding box of the node in the objective hierarchy. Default value is "black".

shift.levels

(optional) number of hierarchical levels by which the node in the objective hierarchy is shifted to make a branch fit better to other branches. Default value is 0.

Author

Peter Reichert <[e-mail]>

References

Short description of the package:

Reichert, P., Schuwirth, N. and Langhans, S., Constructing, evaluating and visualizing value and utility functions for decision support, Environmental Modelling & Software 46, 283-291, 2013.

Textbooks on the use of utility and value functions in decision analysis:

Keeney, R. L. and Raiffa, H. Decisions with Multiple Objectives - Preferences and Value Tradeoffs. John Wiley & Sons, 1976.

Eisenfuehr, F., Weber, M. and Langer, T., Rational Decision Making, Springer, Berlin, 2010.

See Also

Print, evaluate and plot the node with

print.utility.conversion.intpol,
summary.utility.conversion.intpol,
evaluate.utility.conversion.intpol and
plot.utility.conversion.intpol.

Create other conversion nodes with utility.conversion.parfun.create. Create end nodes with

utility.endnode.discrete.create,
utility.endnode.parfun1d.create,
utility.endnode.intpol2d.create,
utility.endnode.parfun1d.create,
utility.endnode.cond.create, or
utility.endnode.firstavail.create.

Create aggregation nodes with

utility.aggregation.create.