MHB Compute probability closeness between points in a 2D surface

AI Thread Summary
The discussion focuses on calculating the probability of elements from set B being within a specified radius of elements from set A on a 2D surface. The user seeks to determine the proportion of points from B that fall within circles centered at points from A. Clarification is provided that the term "ray" was incorrectly used and should be "radius." The conversation emphasizes the need for precise terminology and understanding of the geometric relationship between the two sets. The final goal is to establish a method for quantifying the presence of B elements around A elements based on defined radii.
LucaDanieli
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Hi all,

Sorry, in my first message, I posted this question in the Basic Probability section, and so I moved it to this section.

I have a surface (for example, a blank paper).
In this surface, I have some elements of the set "A" randomly distributed.
In this surface, I also have some elements of the set "B" randomly distributed.
I would like to understand how may elements of "B" are present within a ray X from any element of "A".

I mean something like: "for each element An, there are N% (probability_result) elements of "B". "

Is it possible?
 
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LucaDanieli said:
I would like to understand how may elements of "B" are present within a ray X from any element of "A".

Possibly need more information. Without more information about the ray, it seems you want to find the diameter of B and relate it to A in some way. What are you trying to do exactly?
 
Hi Joppy,

thank you for your reply. Indeed I am not a mathematician so I was not able to understand how much information you need. I have improved the explanation in this Stackoverflow thread: https://math.stackexchange.com/questions/3403515/compute-probability-closeness-points-within-2d-surface?noredirect=1#comment7002121_3403515

Does it help understanding my question?
 
I think by "ray" you mean "radius"? So perhaps the question is: given a sequence of points representing circle centers ($A_n$) with radii $r$ and a collection of points $B_m$, what proportion of points $B_n$ are contained within each circle centered at $A_n$?
 
Hi Joppy,

thanks for clarifying. Indeed it's radius and not ray. (I guess "ray" indicates the sunlight... in Italian they have the same term).
So the final question is exactly as you summarized.

So: given a sequence of points representing circle centers (An) with radii r and a collection of points Bm, what proportion of points Bn are contained within each circle centered at An ?

Thanks also for making terminology more correct.
 
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