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machine-learning-ex2/ex2/plotData.m
2017-05-28 06:50:45 +09:00

35 lines
880 B
Matlab

function plotData(X, y)
%PLOTDATA Plots the data points X and y into a new figure
% PLOTDATA(x,y) plots the data points with + for the positive examples
% and o for the negative examples. X is assumed to be a Mx2 matrix.
% Create New Figure
figure; hold on;
% ====================== YOUR CODE HERE ======================
% Instructions: Plot the positive and negative examples on a
% 2D plot, using the option 'k+' for the positive
% examples and 'ko' for the negative examples.
%
pos = find(y==1);
neg = find(y == 0);
plot(X(pos, 1), X(pos, 2), 'k+','LineWidth', 2, 'MarkerSize', 7);
plot(X(neg, 1), X(neg, 2), 'ko', 'MarkerFaceColor', 'y', 'MarkerSize', 7);
ylabel('Exam 2 score');
xlabel('Exam 1 score');
legend('Admitted', 'Not admitted');
% =========================================================================
hold off;
end