Matlab:范围内无重复的随机整数 [英] Matlab: random integers from a range with no repetition

问题描述

我想使用不重复的范围内包含随机整数的数组，我用过:

I want to get an array with randomized integer included in range with no repeat, I used :

randperm(15,3)

输出为:

8, 10, 12

此函数不使用范围，我想仅从10个随机值中选择一个.

This function not use a range, I would like to random values only from 10 e.g.

推荐答案

如果拥有统计信息"工具箱，则可以使用 randsample ，无需替换.

If you have the Statistics toolbox, you can use randsample without replacement.

% MATLAB R2017a
LB = 3;   % lower bound of range (integer)
UB = 17;  % upper bound of range (integer),  UB > LB
randsample(LB:UB,3,'false') 

@ Wolfie 的方法使用

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请注意， randi 可行可以很好地处理范围内的均匀分布(离散均匀)整数，但可以对进行替换采样(可以重复).据我所知，这不需要任何工具箱，但需要结合一个过程来删除重复项并重新采样，直到所有整数都是唯一的为止.

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Notice that randi works well for uniformly distributed (discrete uniform) integers in a range but it samples with replacement (can give duplicates). This requires no toolbox to my knowledge but would require combining with a procedure to remove duplicates and resample until all integers were unique.

randi([LB UB],3,1)

注意:如果@Wolfie将其发布为答案或可以使此答案成为社区Wiki，则将删除@ Wolfie 的方法.基于共识.

Note: will remove @Wolfie's method if @Wolfie posts it as answer or can make this answer community wiki based on consensus.

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