Questions tagged [decision-tree]

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Decision Tree for searching an element in an n*n matrix

I just learnt decision tree concept in class. I have a question for homework. It says to prove that for searching an element in n*n matrix the lower bound is logn and prove it using decision tree. My ...
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Classify/Distinguish between 8008 binary grids, with 13 queries

I have $8008$ binary grids of size $6 \times 10$ (they are all grids with the property described below), which I want to distinguish between with at most $13$ queries. A query will determine if the ...
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Avoiding collisions in space and time

Say I have an image, represented as a 2D array of pixel values. Also, say I have a set of points on that image where each has a current (x, y) position and a Destination (x, y) associated with it. I ...
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Attribute Selection for minimum number of clusters

I have a table consisting of some headers $P, Q, R, S$ (shown in blue in Table 1). According to the headers, the column $T$ is populated using some predefined logic. Now, any of the headers $P,Q,R,S$ ...
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Decision tree selection by error rate (What does this mean?)

I am asked to select a attribute based on it's error rate Could someone please explain me this? Let's say I have this data for example reasons For a attribut 3 Yes that classifies as + 1 Yes ...
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Decision tree: how to decide the next node?

I have to decide for which value of "Klasse" How do i do it? I know that I have to decide on maximum information gain So first off I've calculated the entropy of "Klasse" That is E(Klasse)= -(3/11*...
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78 views

vc dimension of binary decision trees of depth d?

how do i find the vc dimension of the hypothesis space H ,of the binary decision trees of depth d-2? will the hypothesis space H consist of{0,1} and the vc dimension is the number of ways in which we ...
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17 views

Same Result of KNN and Decision Tree

Given a decision tree, is it possible to find a KNN classifier giving the exact same classification?
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Can an optimal global classification tree be constructed from trees for single categories?

Suppose we have a set of objects, each belonging to one of the disjoint categories $c_1, ... , c_n$. Suppose further that for every single category $c_i$ there is a corresponding set $T_i$ that ...
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15 views

how can i find that the size of tree which is built by C5.0 algorithm is good?

I built C5.0 for balancing data with 16 attributes. and the size of my model is 125 and it used 15 attributes for building model.how can i find the size is good?
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237 views

Random Forest - Conditional Permutation Importance

I've been looking for the most unbiased algorithm to find out the feature importances in random forests if there are correlations among the input features. Besides the most commonly preferred ...