Random numbers from array
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Suppose I have the following array A=[2,1,5,6,20,55,6,9,100,1000,325,2301] which contains distinct numbers I want to select for example four elements from the array randomly and then delete them from the original array. For example if the selected numbers were 20,2,9,325 so the new array R=[20,2,9,325] and A=the remaining elements.
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Geoff Hayes
2015-11-7
编辑：Geoff Hayes
2015-11-7
Mohammed - just use randperm to generate four random numbers that you can use as indices into your array. Try the following
% generate the four random indices
randIdcs = randperm(length(A),4);
% initialize R to be the four numbers of A
R = A(randIdcs);
% remove those four numbers from A
A(randIdcs) = [];
If order is important, then just sort the output of randperm
randIdcs = sort(randperm(length(A),4));
2 个评论
Yasir Khan
2024-7-14
will these indices be unique?
Walter Roberson
2024-7-14
The output of randperm() will be unique values.
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