evaluate_scenario: Evaluate Node Values in a Tree

In dexisensitivity: 'DEXi' Decision Tree Analysis and Visualization

Evaluate Node Values in a Tree

Description

Calculates the values of the tree nodes using a bottom-up approach. The function starts by assigning values to the leaves, based on the provided option, and then aggregates these values up the tree to determine each node's value. This ensures each node's value considers the values of its child nodes.

Usage

evaluate_scenario(tree, option)

Arguments

tree	A Tree object.
option	A matrix representation of a scenario, providing values for the tree's leaves. Each column in the matrix corresponds to a tree leaf, and the rows provide different values for the scenario analysis.

Details

Begins by assigning values to the leaves of the tree based on the provided option. If the tree structure indicates leaf-aggregated scenarios, these values are aggregated accordingly. The function then continues to aggregate values up the tree, considering the tree's structure, to determine each node's value.

It's essential for the input option matrix to have columns that correspond to the leaves of the tree and for the tree object to have the appropriate attributes set.

Value

A named numeric vector representing the evaluated values for all nodes, progressing from the leaves to the root.

Examples

tree <- dexisensitivity::masc2
option <- create_options(tree, num_options=1, seed = 42)
scenario <- evaluate_scenario(tree, option)
scenario

dexisensitivity documentation built on Oct. 30, 2024, 1:08 a.m.