nction plotDecisionBoundary (theta, X, y) LOTDECISIONBOUNDARY Plots the data points X and y into a new figure wi he decision boundary defined by theta PLOTDECISIONBOUNDARY (theta, X,y) plots the data points with + for the positive examples and o for the negative examples. X is assumed to be a either 1) Mx3 matrix, where the first column is an all-ones column for the intercept. 2) MxN, N>3 matrix, where the first column is all-ones Plot Data ptData (X (:,2:3), y); ld on size (X, 2) <= 3 % Only need 2 points to define a line, so choose two endpoints plot_x = [min (X (:, 2))-2, * Calculate the decision boundary line plot_y = (-1./theta (3)).* (theta (2).*plot_x + theta (1)); * Plot, and adjust axes for better viewing plot (plot_x, plot_y) * Legend, specific for the exercise legend ('Admitted', 'Not admitted', 'Decision Boundary') se axis ([30, 100, 30, 100]) * Here is the grid range u = linspace (-1, 1.5, 50); max (X (:, 2))+2]; olo olo olo olo olo olo olo olo olo olo olo olo

nction plotDecisionBoundary (theta, X, y) LOTDECISIONBOUNDARY Plots the data points X and y into a new figure wi he decision boundary defined by theta PLOTDECISIONBOUNDARY (theta, X,y) plots the data points with + for the positive examples and o for the negative examples. X is assumed to be a either 1) Mx3 matrix, where the first column is an all-ones column for the intercept. 2) MxN, N>3 matrix, where the first column is all-ones Plot Data ptData (X (:,2:3), y); ld on size (X, 2) <= 3 % Only need 2 points to define a line, so choose two endpoints plot_x = [min (X (:, 2))-2, * Calculate the decision boundary line plot_y = (-1./theta (3)).* (theta (2).plot_x + theta (1)); Plot, and adjust axes for better viewing plot (plot_x, plot_y) * Legend, specific for the exercise legend ('Admitted', 'Not admitted', 'Decision Boundary') se axis ([30, 100, 30, 100]) * Here is the grid range u = linspace (-1, 1.5, 50); max (X (:, 2))+2]; olo olo olo olo olo olo olo olo olo olo olo olo

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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