Machine learning Adaboost question: Assume that the weak learners are a finite set of decision stumps....

Machine learning Adaboost question:

Assume that the weak learners are a finite set of decision stumps. We then train an AdaBoost classifier. Can the boosting algorithm select the same weak classifier more than once? Explain.

Expert Solution

A Classifier that performs poorly but better than random guessing is a weak classifier.Presently on the off chance that we use decision stumps as weak learners, at that point the algorithm can choose same weak classifier more than once.During the boosting process, a weak classifier is first trained with sample training data set as usual:

All training data samples cannot be classified correctly since the weak classifier is less powerful.The central thought behind boosting is to allot enormous weight to the (difficult) training data samples that were not correctly classified by the first classifier and train the second classifier with the weights. Because of this weighting scheme, the subsequent classifier prepared in this way would effectively classify some of the difficult training samples.

Difficult training samples will have large weights so repeating this weighted learning technique will lead to a classifier that can correctly classify the most difficult training samples. Therefore Adaboost can choose same weak classifier more than once.

venereology answered 2 years ago

Assume that the weak learners are a finite set of decision stumps. We then train a...

Assume that the weak learners are a finite set of decision stumps. We then train a AdaBoost classifier. Can the boosting algorithm select the same weak classifier more than once? Explain.

Describe how can the needs of different learning styles (auditory learners, visual learners, tactile learners, kinesthetic...

Describe how can the needs of different learning styles (auditory learners, visual learners, tactile learners, kinesthetic learners) be addressed when teaching a one hour session or group?

Question 4: Learning and memory: College students and life-long learners (such as professors) need to optimize...

Question 4: Learning and memory: College students and life-long learners (such as professors) need to optimize their learning and memory capabilities. Describe the two basic mechanisms by which the circadian timing system influences learning and memory, including an example of each one. Also, based on what we have studied in this course, describe some of the ways in which you could enhance your cognitive skills by making adjustments in your daily habits and lifestyle that affect your circadian rhythms and...

This question is about the class Set, as discussed in the lectures. It represents a finite...

This question is about the class Set, as discussed in the lectures. It represents a finite set of int’s. Relevant parts of Set are shown below. The integer count holds the number of elements in the Set. The array elements holds the elements themselves. The class Set also has public methods addElement, equals, isIn, and toString. They are defined as in the lectures, and you can use them if you need to. class Set { private int count; private int...

Prove or Disprove The set of all finite strings is undecidable. The set of all finite...

Prove or Disprove The set of all finite strings is undecidable. The set of all finite strings is recognizable

Now set up the decision criteria. (Assume α = .01.) This question has two parts: a)...

Now set up the decision criteria. (Assume α = .01.) This question has two parts: a) state the number of tails; and b) state the critical value(s) of the test statistic.

“Decision-making is best left to machines (artificial intelligence, machine learning)” Take a position on the above...

“Decision-making is best left to machines (artificial intelligence, machine learning)” Take a position on the above statement (agree, disagree or it depends). Anticipate what someone holding the opposite position would say (if you chose it depends assume the opposing position is “agree”) Counter the opposition’s argument

Describe how learners’ level of anxiety is likely to affect their learning and performance, being sure...

Describe how learners’ level of anxiety is likely to affect their learning and performance, being sure to include the concepts of facilitating anxiety and debilitating anxiety in your discussion. Then describe three strategies you might use to keep learners’ anxiety at a productive level.

Transformative learning experiences by their nature, change the adult learners worldview by creating a new perspective...

Transformative learning experiences by their nature, change the adult learners worldview by creating a new perspective in the learner's mind. What are the best strategies that a teacher can employ to help adult learners deal with the new perspective? How can these strategies be implemented? Support your view

What is the decision learning tree?

Question