Drawing a rectangle with special specifications

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Stephen 2014-5-16

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https://ww2.mathworks.cn/matlabcentral/answers/129876-drawing-a-rectangle-with-special-specifications

评论： Henric Rydén 2014-5-19

how can i draw a 172*172 that first edge is black (intensity=0) and second edge 10% brighter and the third edge 10% brighter than second and the last edge 10% brighter than third edge...

thank you for your answers

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Answer 1

Henric Rydén 2014-5-16

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https://ww2.mathworks.cn/matlabcentral/answers/129876-drawing-a-rectangle-with-special-specifications#answer_137044

编辑：Henric Rydén 2014-5-16

在 MATLAB Online 中打开

figure;
axes('XLim', [-50 200],'YLim', [-50 200]);
line([0 172],[172 172],'LineWidth',5,'Color',[0 0 0])
line([172 172],[172 0],'LineWidth',5,'Color',[.1 .1 .1])
line([172 0],[0 0],'LineWidth',5,'Color',[.2 .2 .2])
line([0 0],[0 172],'LineWidth',5,'Color',[.3 .3 .3])

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Star Strider 2014-5-16

在 MATLAB Online 中打开

To compensate for line thickness, change it to:

figure;
axes('XLim', [-50 200],'YLim', [-50 200]);
line([-2 174],[172 172],'LineWidth',5,'Color',[0 0 0])
line([172 172],[174 -2],'LineWidth',5,'Color',[.1 .1 .1])
line([174 -2],[0 0],'LineWidth',5,'Color',[.2 .2 .2])
line([0 0],[-2 174],'LineWidth',5,'Color',[.3 .3 .3])

Henric Rydén 2014-5-19

If you need nicer corners you should use patch instead of line. The syntax is similar, but you give coordinates of faces and vertices. You can also set transparency of patch objects.

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