Creating a loop to find next point in array

Question

Joe Cousins 2021-8-27

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1441739-creating-a-loop-to-find-next-point-in-array

评论： Joe Cousins 2021-8-27

function [next_point, distance] = find_next_point(current_point, points_to_check, x, y)
distance = compute_distance(current_point, points_to_check, x, y) %find all distances in array
[distance, idx] = min(distance) %find smallest of these distances
next_point = points_to_check(idx)
end

If current_point = [1] and points_to_check = [2 3 4 5 6 7 8 9 10 11 12] how can I turn this code into a for loop so that it determines the smallest distance to the next point (taken from points_to_check) for each iteration?

e.g. after the first iteration current_point = [4] and points_to check = [2 3 5 6 7 8 9 10 11 12] so each iteration the current point is removed from points_to_check and the current_point changes depending on which is the closest point.

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Answer 1

Kevin Holly 2021-8-27

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1441739-creating-a-loop-to-find-next-point-in-array#answer_775389

编辑：Kevin Holly 2021-8-27

在 MATLAB Online 中打开

Edit: I just realized I misread what you wanted. I thought you needed to remove the distance, not current_point.

Assuming index for distance is same as index for points_to_check. Let me know if this works.

function [next_point, distance] = find_next_point(current_point, points_to_check, x, y)
next_point = [];
for i = length(points_to_check):-1:1
distance = compute_distance(current_point, points_to_check, x, y); %find all distances in array
[~, idx] = min(distance); %find smallest of these distances
%save array of answers
next_point = [next_point points_to_check(idx)];
%Update parameters for next run
current_point = points_to_check(idx);
points_to_check(idx) = [];
end
end