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u design a binary classifier by assigning item į to class 1 when sign(x w) = 1, and ite class 2 when sign(x w) ctor of weights. Let y be a vector of labels. Which of the following are expressions for t or rate of your classifier? -1, where x; is a feature vector, i 1,..., n and w is a

u design a binary classifier by assigning item į to class 1 when sign(x w) = 1, and ite class 2 when sign(x w) ctor of weights. Let y be a vector of labels. Which of the following are expressions for t or rate of your classifier? -1, where x; is a feature vector, i 1,..., n and w is a

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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You design a binary classifier by assigning item į to class 1 when sign(x w) = 1, and item į to class 2 when sign(x w) = -1, where x; is a feature vector, i = 1,..., n and w is a vector of weights. Let y be a vector of labels. Which of the following are expressions for the error rate of your classifier? 2n :1 O+ E |sign(x{ w) – y:| W 2n ri=1 E (x w – y:)? 1 un 2n vi=1 ||y – Xw| 12 The number of misclassifications divided by the number of classifications attempted.
Transcribed Image Text:You design a binary classifier by assigning item į to class 1 when sign(x w) = 1, and item į to class 2 when sign(x w) = -1, where x; is a feature vector, i = 1,..., n and w is a vector of weights. Let y be a vector of labels. Which of the following are expressions for the error rate of your classifier? 2n :1 O+ E |sign(x{ w) – y:| W 2n ri=1 E (x w – y:)? 1 un 2n vi=1 ||y – Xw| 12 The number of misclassifications divided by the number of classifications attempted.
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