decision tree


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de·ci·sion tree

(dē-sizh'ŭn trē),
A graphic construct showing available choices at each decision node of managing a clinical problem along with probabilities (if known) of possible outcomes for patient's freedom from disability, life expectancy, and mortality.

decision tree

a systematic method of managing a problem by graphically organizing the probabilities of outcomes of alternative treatments. At each decision node or branch a possible alternative is matched with its relative worth, quality of life, freedom from disability, and other factors on which a prognosis may be based.

decision tree

Decision-making A schematic representation of the major steps taken in a clinical decision algorithm; a DT begins with the statement of a clinical problem that can be followed along branches, based on the presence or absence of certain objective features, and eventually arrive at a conclusion

de·ci·sion tree

(dĕ-sizh'ŭn trē)
A graphic construct showing available choices at each decision node of managing a clinical problem along with probabilities (if known) of possible outcomes for patient's freedom from disability, life expectancy, and mortality.

de·ci·sion tree

(dĕ-sizh'ŭn trē)
A graphic construct showing available choices at each decision node of managing a clinical problem along with probabilities (if known) of possible outcomes for patient's freedom from disability, life expectancy, and mortality.

decision tree,

n an algorithm or a formal stepwise process used in coming to a conclusion or making a judgment.

decision

a choice between a number of possible answers to a question.

decision analysis
a systematic approach to decision making under conditions of imperfect knowledge; a practical application of probability theory. Used to calculate the optimal strategy from among a series of alternative strategies. May be expressed graphically in the form of a decision tree (below).
decision making
making a decision can be done in three principal ways and many variations and mixtures of the methods: (1) rote, the decision is made on the basis of a set of rules and no selectivity is required; (2) intuitive, decisions are made on the basis of cerebrally stored information and reasoning systems which permit a fast response. The increasing complexity of veterinary clinical questions increases the probability of error; (3) decision analysis, a means of solving complicated problems by including all of the factors that could possibly affect the outcome of the analysis in a series of sequential questions. This gives each of the factors an opportunity of affecting the outcome. The chance of error by omission can be eliminated but the process is prolonged.
decision theory
the theoretical basis for decision analysis.
decision tree
a diagrammatic representation of the possible outcomes and events used in decision analysis. The questions to be asked in an analysis of a question are arranged as a series of nodes each with a yes and no branch, creating an arborization effect. The sequential steps proceed with each step depending on the decision made in the preceding step.

tree

1. an anatomical structure with branches resembling a tree.
2. in information science, a decision tree.

bronchial tree
the trachea, bronchi and successive branching generations of the respiratory passages.
tree daffodil
thevetiaperuviana.
decision tree
see decision tree.
tree diagram
see decision tree.
tree lupin
lupinusarboreus.
tree nettle
see urtica.
tree shrew
primitive arboreal mammal that some taxonomists place with the primates. Like squirrels in shape and size. Called also Tupaia spp.
tree snake
a number of colubrid snakes that lead an arboreal existence and practice falling from trees with their body spread out, earning the name of flying snake.
tree tobacco
nicotianaglauca.
tracheobronchial tree
the trachea, bronchi and their branching structures.
tree zamia
cycasarmstrongii, C. media.
References in periodicals archive ?
After 4 weeks the decision tree group cut the average number of cigarettes smoked daily significantly more than the standard care group (10 versus 6 cigarettes per day) (Figure 1).
Algorithm: Weighted Decision Tree Prediction Input: Landslide Training dataset TD: Landslide Factors F.
The structure of the decision tree used by Heiney et al.
The two disjoint groups so obtained are then used to train a SVM classifier in the root node of the decision tree.
The analytical results of the Decision Tree are judged based on classification probability and classification effectiveness.
Koh (2004) compared the ability of a logistic regression model, a neural network, and a decision tree to accurately classify 165 U.
Figure 4 shows a portion of the decision tree for classifying consonants.
The decision tree accounts for this fact by offering a range of "collaborative postures" a tutor can take by considering what kind of knowledge the writer needs.
Again, in decision tree making appeared similar variables that were detected by regression method: operative costs / assets ratio and GDP per capita.
Using the expression values of the 108 genes identified in the literature as breast cancer-related as input to the decision tree algorithm, the team analyzed gene expression data from 75 women, 53 of whom had been diagnosed with breast cancer.
A new report, The Shopping Decision Tree, published by the Meat and Livestock Commission, aims to help retailers understand how consumers make meat-buying decisions.

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