increasing the fontsize of the y-label tickmarks on a dendrogram/tree

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cgo 2020-5-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/537535-increasing-the-fontsize-of-the-y-label-tickmarks-on-a-dendrogram-tree

评论： Adam Danz 2021-5-25

I created a dendrogram where the x-axis is the distance/dissimilarity between clusters and the y-axis are the objects. I want to increase the font size, but only the x-axis objects are increased, the y-axis labels remain the same. How do I do this?

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Adam Danz 2020-5-29

I can provide a quite answer as soon as I have a working example that produces your plot (or you could attach the figure file).

cgo 2020-5-29

在 MATLAB Online 中打开

%%I also made modifications to the colours as a visualization requirement.
X = rand(10,5);
Y = pdist(X); 
Z = linkage(Y);
labels = {'man1','man2', 'man3','man4','man5','woman1','woman2','woman3','woman4', 'woman5'};
H = dendrogram(Z,0, 'Labels', labels, 'Orientation','left'); 
set(H,'LineWidth',2)
ax = gca; % get the axes handle
X = get(ax.Children,'XData'); % Get x values of all lines
Y = get(ax.Children,'YData'); % Get y values of all lines
ax = gca; % get the axes handle
lab = ax.YAxis.TickLabels; % get all the labels
loc = ax.YAxis.TickValues; % get all labels location
[ulab,~,lab_ind] = unique(lab); % find all unique labels
clr = lines(numel(ulab)); % make a color map
for k = 1:numel(ulab) % for every type of lable
    ind = strcmp(ulab{k},lab); % find all instances in lab
    x = repelem(ax.XAxis.Limits(1)-0.01,sum(ind)); % make an x position vector
     % place this lable at the same locations with a distinct color:
    text(x,loc(ind),lab(ind),'Color',clr(k,:));
end
ax.YAxis.TickLabels = []; % remove the original labels
% replace the original labels with white space, to keep the axes position:
ax.YAxis.TickLabels = repelem('  ',max(cellfun(@numel,lab)));
for k = 1:numel(Y)
    if Y{k}(1)==fix(Y{k}(1))
        line(ax,X{k}(1:2),Y{k}(1:2),'Color',clr(lab_ind(Y{k}(1)),:),...
            'LineWidth',2);
    end
    if Y{k}(3)==fix(Y{k}(3))
        line(ax,X{k}(3:4),Y{k}(3:4),'Color',clr(lab_ind(Y{k}(3)),:),...
            'LineWidth',2);
    end
end
set(gca,'fontsize',18)
xlabel('distance/dissimilarity between clusters');

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Answer 1

Adam Danz 2020-5-29

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/537535-increasing-the-fontsize-of-the-y-label-tickmarks-on-a-dendrogram-tree#answer_442451

在 MATLAB Online 中打开

Your y-labels aren't really tick labels. They are text objects. You need to store their handles and set their fontsize directly.

textLabels = gobjects(size(ulab));              %  PREALLOCATE HANDLES VECTOR
for k = 1:numel(ulab) 
     % [ YOUR OTHER CODE GOES HERE] .... 
     
    textLabels(k) = text(x,loc(ind),lab(ind),'Color',clr(k,:));  % STORE EACH HANDLE
end

Then change fontsize

set(textLabels,'FontSize', 18)

However, the whole approach seems inefficient.

Instead of defining the labels at the top of your code and then change the labels within the loop, just set the labels correctly before making the plot. That way your lables are actual y-tick labels and will respond to set(gca,'fontsize',18).