Is it possible to make a circle containing specific points?

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Sierra
Sierra 2022-6-2
评论： Sierra 2022-6-4
I want to make a circle using 'percentile'.
for example, If the percentile is 100, the circle contains every points.
I know how to make a quadrangle using perenctile. but i have no idea making a circle using percentile.
Thanks.
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Jan
Jan 2022-6-2
@Sierra: Let me ask you again to provide some input data, such that the readers do not have to guess, how the dots are stored. Many of your questions are hard or impossible to answer, because you do not provide enough details and several questions for clarifications did not get any response from you.
This is not an efficient way to use the forum. Please read and consider this: https://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

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Image Analyst
Image Analyst 2022-6-2
Ran in:
You can use viscircles to draw a circle. Something like
numPoints = 200;
x = rand(1, numPoints) - 0.5;
y = rand(1, numPoints) - 0.5;
plot(x, y, 'b.', 'MarkerSize', 20);
grid on;
radii = sort(sqrt(x.^2 + y.^2), 'ascend');
% Find circle with 70% of the points
index = 70*length(radii)/100
index = 140
radius = radii(index)
radius = 0.4631
viscircles([0,0], radius, 'Color', 'r')
ans =
Group with properties: Children: [2×1 Line] Visible: on HitTest: on Show all properties
title('70% of points are within the red circle')
axis square

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