How can I write a function that draws a regular polygon with n sides in a polar coordinate plot?
16 ビュー (過去 30 日間)
古いコメントを表示
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 件のコメント
Danielle Wojeski
2016 年 12 月 31 日
編集済み: Walter Roberson
2016 年 12 月 31 日
%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
採用された回答
Azzi Abdelmalek
2013 年 3 月 7 日
close
sides=5
degrees=2*pi/sides
theta=0:degrees:360-degrees
radius=ones(1,numel(theta))
polar(theta,radius)
2 件のコメント
Azzi Abdelmalek
2013 年 3 月 7 日
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)
その他の回答 (1 件)
Carson Cooper
2017 年 2 月 13 日
編集済み: Carson Cooper
2017 年 2 月 13 日
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 件のコメント
Anders Bray
2022 年 7 月 11 日
theta includes 0 as the first step making it an 1x(sides+1) that is why have to accomidate.
debashish panda
2022 年 8 月 29 日
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
参考
カテゴリ
Help Center および File Exchange で Cartesian Coordinate System Conversion についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!