How do I concatenate multiple vectors at random order?

Hi All!

I'm generating trajectories for participants to follow in a study. They consist of different segments, that i have in vectors - 20-30 different ones, of different lengths.

Now I'd like to concatenate these vectors at a random order in order to generate different trajectories for each participant.

So if I've got

a=1:10;

b=2:12;

c=3:13;

I'd like to get a vecor [a, b, c] whereby the order of a, b and c are randomly chosen (so b, c, a; c, a, b; and so on)

Is there an easy solution for this?

Answer 1

[KSSV]

Use them as cells and make the indices random.

a{1} = 1:10 ;
a{2} = 2:12 ;
a{3} = 3:13 ;
idx = randperm(3) ;
iwant = cell2mat(a(idx)) ;

[Reto Togni]

excellent! thanks for the quick help!