如何找到一个给定数组A1的指数，*其值几乎相当于第二阵列A2值的* *任何任何*？ [英] How do I find the indices of a given array A1, *any* of whose values are practically equivalent to *any* of the values of a second array A2?

问题描述

通过几乎等同，我的意思是，他们的距离是为了小量的分开（或0.000001）。平等MATLAB往往并没有真正长期浮点数工作。

By "practically equivalent", I mean that their distances are of order epsilon apart (or 0.000001). Equality in MATLAB often doesn't really work for long floating numbers.

如果我只是做ABS（A1 - A2）＆LT; 0.000001，它不会因为尺寸（A1）上班！=尺寸（A2）

If I simply do abs(A1 - A2) < 0.000001, it's not going to work since size(A1) != size(A2)

推荐答案

您可以通过计算使用两个向量之间的距离得到的答案MATLAB的 pdist2 功能。

You can get the answer by calculating distance between two vectors using MATLAB's pdist2 function.

dist=pdist2(A1,A2);
minDist=min(dist,[],2);
indices_A1=minDist<=0.000001;
desired_A1=A1(indices_A1);

没有测试，但应该工作。

Not tested, but should work.

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