清空筛选条件
清空筛选条件

Drawing a semi-circle in Matlab about a point

109 次查看（过去 30 天）
Stuart
Stuart 2012-3-13
回答： Krithik 2022-12-29
Hi,
There seem to be several different ways to draw a semi-circle according to google, however none of the answers seem to give me what I need.
I would like a semi-circle (from twelve to six, if it were a clock) about the point (5,4),
Does anyone know how to do this?
I have tried rectangle with curvature, polar coodinates and the equation of a circle, but something always seems to go wrong.
This gets me closest:
theta = 0:.01:pi-pi/2; y = 1.8*exp((1j)*theta)+5.8; plot(real(y),imag(y)); axis([0 28 0 15]); axis equal;
However the centre of the circle is on the x axis and not at y=4.5.
Thanks for your help.

请先登录，再回答此问题。

采纳的回答

Matt Kindig
Matt Kindig 2012-3-13
th = linspace( pi/2, -pi/2, 100);
R = 1; %or whatever radius you want
x = R*cos(th) + 5;
y = R*sin(th) + 4;
plot(x,y); axis equal;

更多回答（1 个）

Krithik
Krithik 2022-12-29
th = linspace( pi/2, -pi/2, 100); R = 1; %or whatever radius you want x = R*cos(th) + 5; y = R*sin(th) + 4; plot(x,y); axis equal;

类别

在 Help Center 和 File Exchange 中查找有关 Introduction to Installation and Licensing 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by