Decision rules

Decision rules

A set of decision rules is the verbal equivalent of a graphical decision tree, which specifies class membership based on a hierarchical sequence of (contingent) decisions. Each rule in a set of decision rules therefore generally takes the form of a Horn clause wherein class membership is implied by a conjunction of contingent observations.

IF

c o n d i t i o n 1

AND

c o n d i t i o n 2

AND ... AND

c o n d i t i o n n

THEN CLASS =

c l a s s i

where $c o n d i t i o n j$ is in general contingent on the choice of $c o n d i t i o n j - 1$ . Decision rules can be transcribed from the corresponding decision tree, or can be induced directly from observations.

Decision rules are commonly used in the medical field. For example, the Ottawa Ankle Rules guide obtaining radiographs for traumatic ankle pain.

See also

Categories:

Decision trees
Machine learning
Computer science stubs

Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

Decision theory — in economics, psychology, philosophy, mathematics, and statistics is concerned with identifying the values, uncertainties and other issues relevant in a given decision, its rationality, and the resulting optimal decision. It is closely related to … Wikipedia
Decision-theoretic rough sets — (DTRS) is a probabilistic extension of rough set classification. First created in 1990 by Dr. Yiyu Yao[1], the extension makes use of loss functions to derive and region parameters. Like rough sets, the lower and upper approximations of a set are … Wikipedia
Decision rule — This article is about decision theory. For the use in computer science, see decision rules. In decision theory, a decision rule is a function which maps an observation to an appropriate action. Decision rules play an important role in the theory… … Wikipedia
Decision downloading — Decision downloading[1] refers to communicating a decision to those who have not been involved in the decision making process. The term “decision downloading” is used to set apart those special situations in which decision makers communicate a… … Wikipedia
Decisión por consenso — Saltar a navegación, búsqueda La decisión por consenso es un proceso de decisión que busca no solamente el acuerdo de la mayoría de los participantes, sino también persigue el objetivo de resolver o atenuar las objeciones de la minoría para… … Wikipedia Español
Decision engineering — framework Decision Engineering is a framework that unifies a number of best practices for organizational decision making. It is based on the recognition that, in many organizations, decision making could be improved if a more structured approach… … Wikipedia
Decision table — Decision tables are a precise yet compact way to model complicated logic.[1] Decision tables, like flowcharts and if then else and switch case statements, associate conditions with actions to perform, but in many cases do so in a more elegant way … Wikipedia
Rules and Regulations — is the second studio album by British grime group Roll Deep and it was released on Roll Deep Recordings, which is usually only used to release mixtapes. The album features other grime acts that are not directly associated with the crew, such as… … Wikipedia
Rules of chess — The rules of chess (also known as the laws of chess) are rules governing the play of the game of chess. While the exact origins of chess are unclear, modern rules first took form during the Middle Ages. The rules c … Wikipedia
Decision stump — An example of a decision stump that discriminates between two of three classes of Iris flower data set: Iris versicolor and Iris virginica. This particular stump achieves 94% accuracy on Iris dataset for these two classes. A decision stump is a… … Wikipedia

Mark and share
Search through all dictionaries
Translate…
Search Internet

Share the article and excerpts