how to create an random points in desired circle using rand function??
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i want to create an one circle and in that i want to create random points and circle around that point at my desired radius,to shoe resource allocation in mobile using matlab
1 个评论
Karleen Tur
2019-3-17
Hello,
I am doing a project related to the resource allocation in femocell. I am also facing this issue and your thread was very helpful for me, so thank you for that.
I wanted to ask you what exactly you did in your project ? so if any part is common I can reffer to your code of matlab.
If you are intersted in helping please let me know on mahimnat27@gmail.com
Kind Regards,
Mahimna
采纳的回答
You need to generate points which have random angles smaller or equal to 2*pi and random radius smaller or equal to the circle radius, here is the code:
n=100; % number of points that you want
center = [1 ,2]; % center coordinates of the circle [x0,y0]
radius = 10; % radius of the circle
angle = 2*pi*rand(n,1);
r = radius*sqrt(rand(n,1));
X = r.*cos(angle)+ center(1);
Y = r.*sin(angle)+ center(2);
plot(X,Y,'.k')
8 个评论
Jayesh Nakum
2015-9-11
Mike Garrity
2015-9-11
When transforming random values from one domain to another, you should pay attention to whether you need the results to be uniformly distributed. The "obvious" solution in this case tends to generate points which are denser near the center than they are near the bounds.
Jayesh Nakum
2015-9-11
Hamoon
2015-9-11
Thank you Mike, that was great, so I change it in the code.
Hamoon
2015-9-11
@Jayesh: You want to draw a circle? just perform these changes to the code:
angle = 0:.01:2*pi;
r = radius;
and also in the end:
plot(X,Y)
Jayesh Nakum
2015-9-11
Hamoon
2015-9-11
When you have one graph and you want to add another graph to it you can use "hold on", like this:
plot(x1,y1);
hold on
plot(x2,y2);
Priyam Shah
2020-9-25
I have an extra question added to the solution as to how to repeat this 1000 times and plot a randomly selected single instance on the graph
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