wehub-resource-sync
34 lines
616 B
Matlab
Executable File
34 lines
616 B
Matlab
Executable File
function plotkde(X, sigma2)
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% Plot 2d kernel density.
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% Written by Mo Chen (sth4nth@gmail.com).
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if nargin < 2
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sigma2 = 1e-1;
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end
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level = 64;
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n = 256;
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X = standardize(X);
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spread(X);
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x_range = xlim;
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y_range = ylim;
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x = linspace(x_range(1),x_range(2), n);
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y = linspace(y_range(2),y_range(1), n);
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[a,b] = meshgrid(x,y);
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z = exp(logkdepdf([a(:)';b(:)'],X,sigma2));
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z = z-min(z);
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z = floor(z/max(z)*(level-1));
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figure;
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image(reshape(z,n,n));
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colormap(jet(level));
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set(gca, 'XTick', [1 256]);
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set(gca, 'XTickLabel', [min(x) max(x)]);
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set(gca, 'YTick', [1 256]);
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set(gca, 'YTickLabel', [min(y) max(y)]);
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axis off
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