Filling area between more curves
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Anezka Koterova
el 15 de Sept. de 2019
Comentada: Anezka Koterova
el 17 de Sept. de 2019
I am trying to colour the area between more curves (given also in implicite form) with one unbounded and transparent colour. This is example, how it should looks like (except from the red vertical line y=2):
And I have a same problem with planes. Is there any function to fill this "multiarea" or area between more surfaces?
I can only use fill, but it does not create comprehensive and transparent area between more curves.
Thank you.
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Bruno Luong
el 15 de Sept. de 2019
Change accordingly to suit your need.
tt = linspace(0,2*pi,361);
xy = [2*cos(tt);
4*sin(tt)];
close all
hold on
plot(xy(1,:), xy(2,:), 'k');
plot([-4 4],[0 0], 'k');
plot([-4 0],[-4 4], 'k');
plot([1 1],[-4 4], 'r');
b = [0; 1]'*xy >= 0 &...
[2; -1]'*xy >= [2; -1]'*[-2;0] ;
xyfill = [[-2;0] xy(:,b) [0; 4]];
patch('xdata',xyfill(1,:),'ydata',xyfill(2,:),'facecolor','b','facealpha',0.2, 'linewidth', 2);
axis equal
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