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I am wondering how I can draw circle seperated by two color...

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Haksun Lee
Haksun Lee 2012-10-25
Hi.. all
As has been mentioned at title, I'd like to draw circle with two color.
For example, upper half circle is red color and lower half circle is blue color.
Which code can I use to draw this circle?
Thank you for reading my writing...
Have a nice day!

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回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2012-10-25
编辑：Azzi Abdelmalek 2012-10-25
x=-1:0.01:1
y1=sqrt(1-x.^2)
plot(y1,'r')
hold on
plot(-y1,'b')
or more general
c=1+2j % circle centre
r=4 % radius
x=real(c)-r:0.01:real(c)+r
y1=sqrt(r^2-(x-real(c)).^2)+imag(c)
plot(x,y1,'r')
hold on
plot(x,-y1+2*imag(c),'b')
axis square
Haksun Lee
Haksun Lee 2012-10-25
Hi! Azzi Abdelmalek.. Thank your for your reply... I resolved the problem complete thanks to you..but I have another question.
Utimately, I am planning to draw two colored circle(including gray, yellow) of folling picture.
Using above reply, which code can I use to draw special circle?
I'd like to accept advice from many people as far as possible.

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