Thread Subject: Plot "fraction" circle

Is there some way to plot a circle in matlab divided in 12 even fractions?

On May 21, 3:43=A0pm, "saneman" <a...@ad.com> wrote:
> Is there some way to plot a circle in matlab divided in 12 even fractions?=


pie(ones(1,12))

"Adam Chapman" <adam.chapman@student.manchester.ac.uk> skrev i en meddelelse
news:fbba7301-ca2a-45ac-a300-71bd9ac7101c@25g2000hsx.googlegroups.com...
On May 21, 3:43 pm, "saneman" <a...@ad.com> wrote:
> Is there some way to plot a circle in matlab divided in 12 even fractions?

pie(ones(1,12))

Ok is it possible to get 12 slices but only list: 0, pi/2, pi, 3/2pi, 2pi ?

It's not clear to me if you want wedges (like slices of pizza) or just
circumferential slices. Either way, you compute draw your own. Hopefully
this attempt at the latter helps.

arcLength = 2*pi/12;
numPoints = 10;
arcPoints = linspace(-arcLength/2,arcLength/2,numPoints);
radius = 1;
clf, axis square, axis off
for k=1:4 %each segment
   theta = (k-1)*pi/2 + arcPoints;
   x = radius*cos(theta);
   y = radius*sin(theta);
   line(x,y)
end

Cheers
Bob

>
> Ok is it possible to get 12 slices but only list: 0, pi/2,
pi, 3/2pi, 2pi ?
>

Using the Line function:


theta = [0,pi/6,pi/3,pi/2];
X = zeros(2,length(theta));
Y = X;
X(2,:) = cos(theta);
Y(2,:) = sin(theta);
X = [X -X -X X];
Y = [Y Y -Y -Y];
lh = line(X,Y);
set(lh(:),'color','k')
x = -1:.001:1;
y1 = sqrt(1-x.^2);
y2 = -y1;
hold on
plot(x,y1,'k',x,y2,'k')
xlim([-1.5 1.5])
ylim([-1.5 1.5])
str = {'Interpreter','latex','FontSize',13,...
       'horizontalalignment','center','Position'};
c1 = {str{:},[1.2 0],'String','$$0,2\pi$$'};
c2 = {str{:},[0 1.2],'String','$${\frac{\pi}{2}}$$'};
c3 = {str{:},[-1.2 0],'String','$$\pi$$'};
c4 = {str{:},[0 -1.2],'String','$${\frac{3\pi}{2}}$$'};
text(c1{:})
text(c2{:})
text(c3{:})
text(c4{:})
axis equal