test.m

Matlab源代码

clear all;clc
data = 3; %data=1,2,3 for the known data plot

if data == 1
    load gauss2;
    m = 2;
    [n f] = size(gauss2);
    d = f - 1;
    data1 = gauss2(:,1:d);
    
    %gauss2 classification
    p = 1; q = 1;
    for i = 1:n    
        if gauss2(i,3) == 0
            class1(p,:) = data1(i,:);
            p = p + 1;
        else 
             class2(q,:) = data1(i,:);
             q = q + 1;
        end
    end
    figure  % open a figure window
    plot(class1(:,1),class1(:,2),'og');
    hold on
    plot(class2(:,1),class2(:,2),'+r');
    hold off
%     axis([-6 6 -6 6]);  % fix the lengths of the axes
    xlabel('Dimension 1');
    ylabel('Dimension 2');
    title('classes computed by k-Means');


elseif data == 2
    load gauss3;
    m = 3;
    [n f] = size(gauss3);
    d = f - 1;
    data1 = gauss3(:,1:d);
    
    %gauss3 classification
    p = 1; q = 1; r = 1;
    for i = 1:n    
        if gauss3(i,3) == 0
            class1(p,:) = data1(i,:);
            p = p + 1;
        elseif gauss3(i,3) == 1
               class2(q,:) = data1(i,:);
               q = q + 1;
        else
               class3(r,:) = data1(i,:);
               r = r + 1;
        end
    end
    figure  % open a figure window
    plot(class1(:,1),class1(:,2),'og');
    hold on
    plot(class2(:,1),class2(:,2),'+r');
    hold on
    plot(class3(:,1),class3(:,2),'*b');
    hold off
%     axis([-6 6 -6 6]);  % fix the lengths of the axes
    xlabel('Dimension 1');
    ylabel('Dimension 2');
    title('classes computed by k-Means');
    
    
    
elseif data == 3
    load iris;
    m = 3;
    [n f] = size(iris);
    d = f - 1;
    data1 = iris(:,1:d);

    %iris classification
    p = 1; q = 1; r = 1;
    for i = 1:n    
        if iris(i,5) == 1
            class1(p,:) = data1(i,:);
            p = p + 1;
        elseif iris(i,5) == 2
               class2(q,:) = data1(i,:);
               q = q + 1;
        else
               class3(r,:) = data1(i,:);
               r = r + 1;
        end
    end
    figure  % open a figure window
    plot(class1(:,1),class1(:,2),'og');
    hold on
    plot(class2(:,1),class2(:,2),'+r');
    hold on
    plot(class3(:,1),class3(:,2),'*b');
    hold off
    % axis([-6 6 -6 6]);  % fix the lengths of the axes
    xlabel('Dimension 1');
    ylabel('Dimension 2');
    title('classes computed by k-Means');
end