Draw an arc

[Carp Fisher]

How would I draw an arc in Matlab--I want to specify the center point, the radius, and the maybe the number of degrees of the arc? I specifically want a 180 degree arc. Thanks in advance, Kim

[Carp Fisher]

[Matt Fig]

I think you need 4 specifications to draw a circular arc. Here is one way to do it.

% arcang: The angle through which the arc passes.
% ang: The offset from 0 degrees till the arc starts.
% c: the [x,y] coords of circle's center.
% r: the radius of the circle.
c = [5 3];
r = 3;
ang = pi;
arcang = pi/2;
t = 0:.1:arcang;
x = r*cos(t+ang)+c(1);
y = r*sin(t+ang)+c(2);
plot(x,y)
xlim([c(1)-1.5*r c(1)+1.5*r])
ylim([c(2)-1.5*r c(2)+1.5*r])
axis equal

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[Husam Aldahiyat]

Carp Fisher <benbn...@hotmail.com> wrote in message <20279956.1234835246...@nitrogen.mathforum.org>...

> How would I draw an arc in Matlab--I want to specify the center point, the radius, and the maybe the number of degrees of the arc? I specifically want a 180 degree arc. Thanks in advance, Kim

There's a function that does this on the File Exchange.

Plot the angle arc for some angle.
http://www.mathworks.com/matlabcentral/fileexchange/21940