在Matlab中找到所有类似的数组索引 [英] find all similar index of array in Matlab

问题描述

我有一个数组X=[1 2 3 1.01 2.01 4 5 1.01 3.01]我想要这个数组的所有索引都相似并且在matlab答案中的区别<=0.01是

I have a array X=[1 2 3 1.01 2.01 4 5 1.01 3.01] I want to all index of this array are similar and difference<=0.01 in matlab answer is

    X1=[1 4 8], X2=[2 5],X3=[3 9],X4=[6],X5=[7]

非常感谢

推荐答案

我认为提交内容具有宽容的独特性" 适合您.

I think the submission "unique with tolerance" in the FileExchange is for you.

您应该注意，将变量X1 ... X5创建为单独的变量是个不好的主意，也是一种不好的做法，因为这使得在以后的代码(矢量化或基于循环)麻烦且效率低下.存储数据的更正确替代方法是 cells (例如(丹尼尔建议的解决方案)或

You should note, that creating the variables X1...X5 as separate variables is a bad idea and a bad practice, because this makes referencing these values in later code (which is either vectorized or loop-based) cumbersome and inefficient. More correct alternatives to storing the data are cells (like in the solution suggested by Daniel) or in structs.

已经说过，如果由于某种原因您仍然想要创建唯一命名的变量，则可以使用上述提交(uniquetol)和eval的组合来实现:

Having said that, if for some reason you still want to create uniquely named variables, this is possible using a mix of the aforementioned submission (uniquetol) and eval:

[~,b,c]=uniquetol(X,0.01+eps);
for ind1 = 1:length(b)
    eval(sprintf('X%d = (find(c==X(b(%d))))'';',ind1,ind1)); 
end

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