De Boundary
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description
it representation classification of different classes using cluster based method. In this approach, we also shows boundary.
Transcript of De Boundary
function[out]=DE_boundary(Class1,Class2,Class3);training = cell(3,1);training{1} = Class1;training{2} = Class2;training{3} = Class3;sample_means = cell(length(training),1);for i=1:length(training),sample_means{i} = mean(training{i});endClass=[Class1;Class2;Class3];am=min(Class);bm=max(Class);xrange = [ceil(am(1))-1,ceil(bm(1))+1];yrange = [ceil(am(2))-1, ceil(bm(2))+1];inc = 0.1;[x, y] = meshgrid(xrange(1):inc:xrange(2), yrange(1):inc:yrange(2));image_size = size(x);xy = [x(:) y(:)];xy = [reshape(x, image_size(1)*image_size(2),1) reshape(y, image_size(1)*image_size(2),1)];numxypairs = length(xy); dist = [];for i=1:length(training), disttemp = sum(abs(xy - repmat(sample_means{i}, [numxypairs 1])), 2);dist = [dist disttemp];end[m,idx] = min(dist, [], 2);decisionmap = reshape(idx, image_size);imagesc(xrange,yrange,decisionmap);hold on;set(gca,'ydir','normal');% colormap for the classes:% class 1 = light red, 2 = light green, 3 = light bluecmap = [1 0.8 0.8; 0.95 1 0.95; 0.9 0.9 1];colormap(cmap);% plot the class training data.plot(training{1}(:,1),training{1}(:,2), 'r.');plot(training{2}(:,1),training{2}(:,2), 'go');plot(training{3}(:,1),training{3}(:,2), 'b*');% include legendlegend('Class 1', 'Class 2', 'Class 3','Location','NorthOutside', ...'Orientation', 'horizontal');% label the axes.xlabel('x');ylabel('y');decisionmap = reshape(idx, image_size);figure;%show the imageimagesc(xrange,yrange,decisionmap);hold on;set(gca,'ydir','normal');% colormap for the classes:% class 1 = light red, 2 = light green, 3 = light bluecmap = [1 0.8 0.8; 0.95 1 0.95; 0.9 0.9 1];colormap(cmap);% plot the class training data.plot(training{1}(:,1),training{1}(:,2), 'r.');plot(training{2}(:,1),training{2}(:,2), 'go');plot(training{3}(:,1),training{3}(:,2), 'b*');% include legendlegend('Class 1', 'Class 2', 'Class 3','Location','NorthOutside', ...'Orientation', 'horizontal');% label the axes.xlabel('x');ylabel('y');end
