increase the thickness + hide some lines generated in the pie chart

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Alberto Acri 2023-11-12

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编辑： Matt J 2023-11-14

采纳的回答： Matt J

在 MATLAB Online 中打开

Hi! I generated this pie chart:

load matrix_new.mat
load color_matrix.mat
% ==========
labels = matrix_new(:,1);
percentages = matrix_new(:,2);
figure
p = pie(percentages);
hText = p(2:2:end);
set(hText,{'String'},compose('%d',labels)); 
[~,idx] = unique(compose('%d (%g%%)',matrix_new),'stable');
set(hText,'FontSize',5);
pPatch = p(1:2:end);
set(pPatch,{'FaceColor'},num2cell(color_matrix,2));

I would need to represent this pie chart by generating thicker lines at the separation from one color to another (see 'color_matrix'). So have a thicker line between row 9-10; 19-20; 30-31; 40-41; 50-51; 60-61; 64-65; 67-68; 69-70; 72-73; 73-1.

I thought of using the 'line' command however how can I determine the start and end coordinates of the line? The start coordinate should coincide with the center of the pie (I assume [0,0]). I would need to locate the other coordinate.

a = [0,0]; 
b = [??,??];
line(a,b,'Color','r','LineWidth',2);

The result to be achieved would be this:

Also I would like to hide some lines, for example rows 41 to 50 in 'color_matrix':

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Paul 2023-11-12

Hi Alberto,

R2023B introduced a new function piechart that is recommended over pie. However, it does not appear that piechart allows for control over the individual wedge edges, unfortunately.

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采纳的回答

Matt J 2023-11-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2046090-increase-the-thickness-hide-some-lines-generated-in-the-pie-chart#answer_1351265

编辑：Matt J 2023-11-12

在 MATLAB Online 中打开

What I would do is overlay another piechart on top of it (with transparent wedges, but thicker lines).

load matrix_new.mat

load color_matrix.mat

% ==========

labels = matrix_new(:,1);

percentages = matrix_new(:,2);

figure

p = pie(percentages);

hText = p(2:2:end);

set(hText,{'String'},compose('%d',labels));

[~,idx] = unique(compose('%d (%g%%)',matrix_new),'stable');

set(hText,'FontSize',5);

pPatch = p(1:2:end);

set(pPatch,{'FaceColor'},num2cell(color_matrix,2));

c=cumsum([0;percentages]);

c=c([10:10:end-1,end-1:end]);

hold on

P=pie(diff(c));

delete(P(2:2:end));

set(P(1:2:end),'LineWidth',2,'FaceAlpha',0,'EdgeColor','r');hold off

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Alberto Acri 2023-11-14

I already knew that! How can I select only the lines of interest?

Matt J 2023-11-14

编辑：Matt J 2023-11-14

在 MATLAB Online 中打开

I've already told you how to hide the lines of a particular patch. You set its LineStyle to 'none'.

load matrix_new.mat

load color_matrix.mat

% ==========

labels = matrix_new(:,1);

percentages = matrix_new(:,2);

figure

p = pie(percentages);

hText = p(2:2:end);

set(hText,{'String'},compose('%d',labels));

[~,idx] = unique(compose('%d (%g%%)',matrix_new),'stable');

set(hText,'FontSize',5);

pPatch = p(1:2:end);

set(pPatch,{'FaceColor'},num2cell(color_matrix,2));

set(pPatch(1:50),'LineStyle','none')

c=cumsum([0;percentages]);

c=c([10:10:end-1,end-1:end]);

hold on

P=pie(diff(c));

delete(P(2:2:end));

set(P(1:2:end),'LineWidth',2,'FaceAlpha',0,'EdgeColor','r');hold off

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类别

MATLAB Graphics 2-D and 3-D Plots Data Distribution Plots Pie Charts

在 Help Center 和 File Exchange 中查找有关 Pie Charts 的更多信息

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MATLAB

版本

R2021b

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