How to shuffle some arrays of a matrix?
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Hi Does any one know how can I randomly shuffle some arrays in a matrix? for example
a=[1 2 3 4 5 6]
I need to choose from for example 2 to 5 and shuffle them like this
a=[1 5 4 2 3 6]
1 Kommentar
Adam
am 12 Aug. 2014
Do you mean you need to choose index positions 2 to 5 or actual numbers 2 to 5? Or is your start array always just a sorted contiguous sequence so they amount to the same thing?
Antworten (5)
Andrei Bobrov
am 12 Aug. 2014
a=[1 2 3 4 5 6];
n = numel(a);
a(2:n-1) = a(randperm(n-2)+1);
0 Kommentare
Michael Haderlein
am 12 Aug. 2014
x=rand(1,6);
[~,y]=sort(x);
a(y)
If a is always just 1:6, you can directly use y instead.
0 Kommentare
Azzi Abdelmalek
am 12 Aug. 2014
a=[1 2 3 4 5 6]
n=2:5
idx=randperm(n(end)-n(1)+1)+n(1)-1
a(n)=a(idx)
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