检测任何值是否在彼此的某个值之内-MATLAB [英] Detecting if any values are within a certain value of each other - MATLAB

问题描述

如果我有

a = [5000 8000 20000 22000 30000]';

有没有一种快速的方法来检测给定的数字是否在另一个数字之内(例如5000)，然后将其删除并用中点替换?理想情况下，我想将此附加到IF语句上，但我真的不知道可以使用哪种函数或数学方法来执行此操作.

Is there any quick way to detect if a given number is within - for example 5000 - of another and then remove both and replace them with the midpoint? Ideally I want to attach this to an IF statement but I really have no idea what sort of function or mathematical method could be used to do this.

所需的输出将是a:

   = [6500 21000 30000];

推荐答案

的方法可能最适合解决它-

accumarray based approach might be best suited to solve it -

th = 5000      %// threshold to choose next elements (edit to specific input)
a = sort(a(:)) %// sort elements
matches = diff(a)>th
idx = cumsum([0 ; matches])+1 %// index each element with their group IDs
out = (accumarray(idx,a,[],@min) + accumarray(idx,a,[],@max))./2
   %// outputs are the midpoints of the min-max boundaries within each group

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