how to make a custom legend

I have the following picture :

And I would like to make a legend for it. Basically, I want to make a legend for each type of rectangle. In the legend box, I want to mark each color line according to the type of body which it marks:

green line : head

yellow line : torso

purple line : right arm

cyan line : left arm

red line : left leg

blue line : right leg

This is basically custom, because I have more rectangles of each type. How can I do a custom legend and attach it to the figure which draws this picture?

---

The simplest way I can think of is to first plot one rectangle of each type and construct a legend for only unique rectangles. Like so:

figure;
hold on;

% unique rectangles
plot(rand(1, 10), 'b');
plot(rand(1, 10), 'g');

% the rest
plot(rand(1, 10), 'b');
plot(rand(1, 10), 'g');

% use normal legend with only as many entries as there are unique rectangles
legend('Blue', 'Green');

You will have many lines of the same color, but a legend only for unique colors.

---

There are 2 ways you could go about this. You could create your squares and then assign them to an hggroup. This way you dont have multiple items for each color. Something like this:

hold on
for ii = 1:4
    hb(ii) = plot(rand(1,2), rand(1,2),'color','r'); 
end

hg = hggroup;
set(hb,'Parent',hg) 
set(hg,'Displayname','Legs')

legend(hg)

Or you could create dummy objects, like this:

hold on
for ii = 1:4
    hb(ii) = plot(rand(1,2), rand(1,2),'color','r'); 
end

p = plot([],[],'r');

legend(p,'Legs')

The former is a little more elegant.

---

我想添加到dvreed77的使用hggroup的清洁图例使用的答案，我还需要设置'IconDisplayStyle'（Matlab R2014a），以便：

%4 kinds of lines:
n_areas = 4;
n_lines = 10;

%use built-in color map
cmap = hsv(n_areas);

%plot lines and generate handle vectors
h_fig = figure;
hold on
h_lines = zeros(1,n_lines);

for l = 1:n_areas

  for k = 1:n_lines
    h_lines(k) = plot(rand(1,2), rand(1,2),'Color',cmap(l,:));
  end

  %Create hggroup and set 'icondistplaystyle' to on for legend
  curPlotSet = hggroup;
  set(h_lines,'Parent',curPlotSet);
  set(get(get(curPlotSet,'Annotation'),'LegendInformation'),...
      'IconDisplayStyle','on');
end

%Now manually define legend label
legend('heads','legs','hands','feet')

链接地址: http://www.djcxy.com/p/67290.html

上一篇: Matlab中多尺度形态学图像简化

下一篇: 如何制作自定义图例