How to add transparency to a dendrogram

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Rafael Freire
Rafael Freire 2020-1-17
编辑： Adam Danz 2020-1-18
Hi. How to add a tranparency to a dendrogram?
% example
X = rand(10,3);
tree = linkage(X,'average');
dendrogram(tree)
Thank you

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回答（1 个）

Adam Danz
Adam Danz 2020-1-17
编辑：Adam Danz 2020-1-18
Set up the dendrogram and store the line object handles from the first output of dendrogram().
% Set up the dendrogram
X = rand(10,3);
tree = linkage(X,'average');
denHand = dendrogram(tree) % Get the line handles output
Set the transparency to 50% (or any other value between 0 and 1) by adding a 4th value to the RGB color vector using the color of the first line object as a base. This is an undocumented feature in Matlab.
% Set transparency of dendrogram lines
set(denHand, 'Color', [denHand(1).Color, 0.5])
To set transparency of the axes (is that what you want to do?),
set(gca, 'color', 'none') % completely transparent
set(gca, 'Color', [1 1 1 .5]) % same undocumented method listed above

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