Delete parts of plotted figures?

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ErikJon Pérez Mardaras 2020-10-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/624108-delete-parts-of-plotted-figures

评论： Star Strider 2020-10-28

采纳的回答： Star Strider

I have made this image

with this code:

axis equal
hold on
caca=2*pi();
ang=linspace(0,caca);
xp=5*cos(ang);
yp=5*sin(ang);
circ=[xp;yp];
plot(xp,yp,'r');
L1=[-8 8; 3 3];                      
plot(L1(1,:),L1(2,:),'b')

And I want to delete the part of the line within the circle and the part of the circle under the line so the image results like this:

Is there any way of achieving that? How can I do it?

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采纳的回答

Star Strider 2020-10-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/624108-delete-parts-of-plotted-figures#answer_522813

Try this:

axis equal
hold on
caca=2*pi();
ang=linspace(0,caca);
xp=5*cos(ang);
yp=5*sin(ang);
circ=[xp;yp];
L1x = linspace(-8, 8);
L1y = 3*ones(size(L1x));
L1=[L1x; L1y];                                      % Re-define Line
incirc = inpolygon(L1x,L1y,circ(1,:),circ(2,:));
L1(1,incirc) = NaN;
L1(2,incirc) = NaN;
plot(xp(yp>=3),yp(yp>=3),'r');
plot(L1(1,:),L1(2,:),'b')