# polar plot bar chart combo or something similar?

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Benjamin Cowen on 9 Jan 2017
Answered: KAE on 27 Apr 2017
Hello,
I have 24 spaced angles such as:
[100],
[10tan(15)],
[10tan(30)]
etc.
Note that tan is in degrees.
For each of these angles I have a value. How can I plot a line of that magnitude at each angle? Can MATLAB handle something like this?

Walter Roberson on 9 Jan 2017
Edited: Walter Roberson on 9 Jan 2017
deg = 0:15:359;
theta = 10*tand(deg);
rho = the values corresponding to each angle
polar(theta, rho)
or
polarplot(theta, rho) %recommended if your MATLAB is new enoug
Benjamin Cowen on 9 Jan 2017
Edited: Benjamin Cowen on 9 Jan 2017
How do I add points at each spot. I see a zig-zagged line, but how can I add a point at each value to highlight where they are?
Walter Roberson on 9 Jan 2017
The revised version
polar([theta;theta], [zeros(size(rho));rho])
does not generate zig-zagged lines.
The zig-zag lines are due to the fact that you specified that your angles are to be 10*tand(0:15:345) which give angles in radians that are all over the place, including +/- infinity.
If you have a column "a" with angles in degrees,
theta = reshape(a*pi/180, 1, []); %want a row output
rho = reshape(b, 1, []); %want a row
polar([theta;theta], [zeros(size(rho));rho])
polar([theta;theta], [zeros(size(rho));rho], '-*')

KAE on 27 Apr 2017
You might want to see windRose on the file exchange.

John BG on 10 Jan 2017
Mr Cowen
simplifying for just 5 sections
with a start point set to [10 10]
with possible angles multiple of of let's say 15º
amount_angles=5;
da=15;
a_range=[0:da:360-da];
na=randi([1 numel(a_range)],1,amount_angles);
a=a_range(na); % angles
d=randi([100 1000],1,amount_angles); % section lengths
p0=[10 10]
figure(1);grid on
plot(p0(1),p0(2),'go')
hold all;
for k=1:1:numel(a)
dx=d(k)*sind(a(k))
dy=d(k)*cosd(a(k))
plot([p0(1) p0(1)+dx],[p0(2) p0(2)+dy],'b')
plot(p0(1)+dx,p0(2)+dy,'ro')
p0(1)=p0(1)+dx
p0(2)=p0(2)+dy
end
I have repeated twice and the green point is the start point while the red points are way points, and in blue each section:
.
John BG