Seperate One Matrix into two!!

Say, I have a matrix

a = [1 2 3 4 5 6 7 8 9 10] 
randsel = randperm (10,5)

Say randsel returns [1 3 5 6 10]

Now, I want to select the rest of the numbers and put it into another matrix ,say 'randsel2'

How to do that??!

Answer 1

[Stephen23]

If you generate all of the indices using randperm, then you can simply select the first half of those indices and the second half: these are all random indices, so the two selections are also random.

>> a = 20:29 % twenties to distinguish from the indices.
a =
    20    21    22    23    24    25    26    27    28    29
>> idx = randperm(10); % generate all indices
>> a(idx(1:5)) % first half of random indices to select one set
ans =
    29    28    25    21    20
>> a(idx(6:end)) % second half of random indices to select reamining
ans =
    22    27    26    23    24

[Sarit Hati]

Thank you man!! Thanks a Lot!!

Any way i solved it differently!!(because i'm a noob)

Say tmp3=10 and tm4=5

randsel = randperm (tmp3,tmp4)
randsel2 = [1:1:tmp3];
  for n=1:tmp4
      for n1=1:tmp3
          if randsel(n)==randsel2(n1);
              randsel2(n1)=0;
          end    
      end
  end
But thanks anyway!!
Cheers!