Question

Plot a star that prompts the user to enter how many points the star has. Only worry about odd numbered points. Indicate to the user only odd numbers can be entered. Change the star line color to red.

How do I solve using Matlab?

Answer 1

n=input('Enter the number of points(Odd only):');
if rem(n,2)==0
disp("Please enter odd number of vertices");
else
xy = linspace(-2*pi, 2*pi, 2*n+1);
radius = 1;
x = radius*cos(xy);
y = radius*sin(xy);
plot( x(1:2:end), y(1:2:end), 'r-' );
axis('equal');
endif

C:\Octave OCTAVE-1.0\mingw64\bin\octave-gui.exe octave:72> n=input('Enter the number of points(Odd only):'); Enter the number of points(Odd only):5 octave:73> if rem(n,2)==0 > disp("Please enter odd number of vertices"); > else > xy = linspace(-2*pi, 2*pi, 2*n+1); > radius = 1; x = radius*cos(xy); > y = radius*sin(xy); > plot( x(1:2:end), y(1:2:end), 'r-'); > axis('equal'); > endif octave:74> Figure 1 | X File Edit Tools Z+ Z- Insert Text Axes Grid Autoscale 0.5 -0.5 -0.5 0 0.5 (0.3098, 0.55385) 6 1 Type here to search Il OT ENG 09:27 30-07-2020