juliavins03 asked . 2020-04-15

Draw arc in Matlab?

In Matlab is there any special function to draw arc with user defined radius, points and angle. If it is not there how is it possible to draw a curve in a figure using user defined radius,angles, points etc.

matlab, plot

Expert Answer

Kshitij Singh answered . 2025-03-28 18:47:49

There are no such functions in core MATLAB, but they’re easy enough to write.

This code plots an arc of stars:

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

N = 25;                                                         % Number Of Points In Complete Circle
r_angl = linspace(pi/4, 3*pi/4, N);                             % Angle Defining Arc Segment (radians)
radius = 1.5;                                                   % Arc Radius
xy_r = circr(radius,r_angl);                                    % Matrix (2xN) Of (x,y) Coordinates

figure(1)
plot(xy_r(1,:), xy_r(2,:), 'bp')                                % Draw An Arc Of Blue Stars
axis([-1.25*radius  1.25*radius    0  1.25*radius])             % Set Axis Limits
axis equal                                                      % No Distortion With ‘axis equal’

arc

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