A question about randomsample syntax

Question

Jianshe Feng 2016-12-14

0
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https://ww2.mathworks.cn/matlabcentral/answers/316794-a-question-about-randomsample-syntax

编辑： KSSV 2016-12-14

I noticed that there are some syntax about how to "randomsample", for example"

y = randsample(n,k)
y = randsample(population,k)

Here is my concern: what if my "population" only has ONE element? for example, suppose my population is [3]. Then what I want by using randomsample(3,1) is to get 3, however, MATLAB will give me a number from [1,2,3] randomly. The reason is obvious - MATLAB takes the 3 as "n" but not "population". Does any one know how to solve this problem?

My application is to use randomsample to write an equipartition function. If you're interested in, my code is as follow:

function group = equipartitionGroup(sample,groupNo)
sampLen = length(sample);
for i = 1:mod(sampLen,groupNo)
    k = ceil(sampLen/groupNo);
    group{i} = randsample(sample,k);
    sample = setdiff(sample,group{i});
end
for i = mod(sampLen,groupNo)+1:groupNo
    k = floor(sampLen/groupNo);
    group{i} = randsample(sample,k);
    sample = setdiff(sample,group{i});
end