Matlab join 2 arcs

Question

I am trying to draw a shape using matlab. Here I need to join arcs. I created arc using following code

circr = @(radius,rad_ang)  [radius*cos(rad_ang);  radius*sin(rad_ang)];         % Circle Function For Angles In Radians

N = 25;                                                         % Number Of Points In Complete Circle

r_angl = linspace(pi/2, 5*pi/4, N);                             % Angle Defining Arc Segment (radians)

radius = 0.5;                                                   % Arc Radius
xy_r = circr(radius,r_angl);                                    % Matrix (2xN) Of (x,y) Coordinates

figure(1)
plot(xy_r(1,:), xy_r(2,:)) 

axis([-1.25*radius  1.25*radius    0  1.25*radius])

Code generates following output

Now I modified code to draw other arc

circr = @(radius,rad_ang)  [radius*cos(rad_ang);  radius*sin(rad_ang)];         % Circle Function For Angles In Radians
N = 25;                                                         % Number Of Points In Complete Circle
r_angl = linspace(pi/2, 5*pi/4, N);                             % Angle Defining Arc Segment (radians)

radius = 0.5;                                                   % Arc Radius
xy_r = circr(radius,r_angl);                                    % Matrix (2xN) Of (x,y) Coordinates




r_angl1 = linspace(4*pi/4,pi/4);                             % Angle   Defining Arc Segment (radians)

radius1 = 0.1;                                                   % Arc Radius
xy_r1 = circr(radius1,r_angl1);                                    % Matrix (2xN) Of (x,y) Coordinates


figure(1)
plot(xy_r(1,:), xy_r(2,:),xy_r1(2,:),xy_r1(1,:))                                
axis([-1.25*radius  1.25*radius    0  1.25*radius])             % Set Axis Limits

axis equal

This code generates

How can I join both arcs? I need to join them using their end points

It's unclear what you are trying to accomplish. Are you wanting to draw straight lines connecting the two arcs? — DMR, Jan 16 '17 at 04:40

score -1 · Answer 1 · answered Jan 16 '17 at 05:01

Inserting the following lines will joint the end points with lines

hold on;
line([xy_r(1,1) xy_r1(1,end)], [xy_r(2,1) xy_r1(2,end)]);
line([xy_r(1,end) xy_r1(2,1)], [xy_r(2,end) xy_r1(1,1)]);

Together:

figure(1)
plot(xy_r(1,:), xy_r(2,:),xy_r1(2,:),xy_r1(1,:))
hold on;
line([xy_r(1,1) xy_r1(1,end)], [xy_r(2,1) xy_r1(2,end)]);
line([xy_r(1,end) xy_r1(2,1)], [xy_r(2,end) xy_r1(1,1)]);

axis([-1.25*radius  1.25*radius    0  1.25*radius])   % Set Axis Limits
axis equal

Matlab join 2 arcs

1 Answers1