How can I write a function that draws a regular polygon with n sides in a polar coordinate plot?
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gm76
am 7 Mär. 2013
Kommentiert: debashish panda
am 29 Aug. 2022
I am unfamiliar with plotting with polar coordinates. Here is what I have so far, which does not work:
function polygon(sides) % Name number of sides of the polygon
degrees=360/sides; % Find the angle between corners in degrees
radius=ones(1,sides) % Array of ones
theta=0:degrees:360 % Theta changes by the internal angle of the polygon
polar(theta, radius) % Plot
end
Thanks!
1 Kommentar
Danielle Wojeski
am 31 Dez. 2016
Bearbeitet: Walter Roberson
am 31 Dez. 2016
%First you need to define the sides variable.
sides=input('input the number of sides you want;, ')
Then you need to make sure the radius and the theta match in size. If your theta starts at 0 it will always be one size bigger then your radius. So instead make it a 1.
It should look like this...
function polygon(sides) % Name number of sides of the polygon
sides = input('input the number of sides you want;, ');
degrees = 360./sides; % Find the angle between corners in degrees
r = ones(1,sides) % Array of ones
theta = 1:degrees:360 % Theta changes by the internal angle of the polygon
polar(theta, r) % Plot
end
Akzeptierte Antwort
Azzi Abdelmalek
am 7 Mär. 2013
close
sides=5
degrees=2*pi/sides
theta=0:degrees:360-degrees
radius=ones(1,numel(theta))
polar(theta,radius)
2 Kommentare
Azzi Abdelmalek
am 7 Mär. 2013
I can't for the moment explain this, It was an error, it should be
sides=9
degrees=2*pi/sides
theta=0:degrees:2*pi
radius=ones(1,numel(theta))
polar(theta,radius)
Weitere Antworten (1)
Carson Cooper
am 13 Feb. 2017
Bearbeitet: Carson Cooper
am 13 Feb. 2017
This gives a better output than those above
function polygon(sides)
sides = input('input the number of sides you want;, ');
radians = (2*pi)./sides;
r = ones(1, sides);
theta = 1:radians:2*pi;
polar(theta, r)
end
4 Kommentare
Anders Bray
am 11 Jul. 2022
theta includes 0 as the first step making it an 1x(sides+1) that is why have to accomidate.
debashish panda
am 29 Aug. 2022
for n=3:1:6
subplot(2,2,n-2)
polygon(n)
end
function polygon(sides)
radians = (2*pi)./sides;
r = ones(1, sides+1);
theta = 0:radians:2*pi;
polar(theta, r)
end
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