paint the circle in half

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gravy
gravy 2024-3-27
评论： Voss 2024-3-27
I need to draw a circle and color the right side of it. I found how to draw a circle, but I don't know how to color half of the circle.
pos = [2 120 2 2];
rectangle('Position',pos,'Curvature',[1 1],'FaceColor',[0 .5 .5])

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Voss
Voss 2024-3-27
编辑：Voss 2024-3-27
Ran in:
pos = [2 120 2 2];
color = [0 0.5 0.5];
r = pos(3)/2;
c = pos([1 2])+r;
th = linspace(-pi/2,3*pi/2,101); % <- use an odd number of points in linspace()
x = c(1)+r*cos(th);
y = c(2)+r*sin(th);
fill(x(1:(end+1)/2),y(1:(end+1)/2),color,'EdgeColor','none')
hold on
plot(x,y,'k')
axis equal
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gravy
gravy 2024-3-27
voss you're strong! thx

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