could anyone help me how to randomly pair two numbers in each pair.

A=[1:12]

now I want to pair two numbers randomly in each pair as [ 1 3] [ 2 6] [7 9] .....

Could anyobe please help me on this.

[David Goodmanson]

HI jaah,

try randperm(12), that should give you some ideas.

[jaah navi]

I tried

randperm(12)

and got the result as

12     9     3    11     4     1     5     8    10     7     2     6

but i want to have the numbers in pairs [ 12 9 ] [ 3 11],... such that numbers should not be repeated again.

Could you help me on this.

[Mathieu NOE]

almost there

just add reshape and you're done

N = 12;
a = randperm(N)
b = reshape(a,N/2,2)

a =

     6     3    11     7     8     5     1     2     4     9    10    12


b =

     6     1
     3     2
    11     4
     7     9
     8    10
     5    12

[jaah navi]

Thanks. It works

Answer 1

[KSSV]

idx = reshape(randperm(12),[],2)

idx = 6×2

2 11 8 10 9 12 7 4 6 1 5 3