How can I create a random vector with at most 1 in it?

2 vues (au cours des 30 derniers jours)
Ezz El-din Abdullah
Ezz El-din Abdullah le 27 Juin 2018
I tried to make a random vector of 0's and 1's like the code below:
v = round(rand(1,n)) % where n is the dimension of the vector
But I'd like to give it a condition to avoid the existence of 1 more than one time. Also, I want the index to be selected randomly.
For example, this:
[1 1 0 0] % where n = 4
is not accepted, but this:
[1 0 0 0]
%or
[0 1 0 0]
either of them will be accepted.
So any help please? Thanks!

Réponse acceptée

Guillaume
Guillaume le 27 Juin 2018
Modifié(e) : Guillaume le 27 Juin 2018
Another option:
v = randperm(n) == n
or
v = randperm(n) == 1
  2 commentaires
Stephen23
Stephen23 le 27 Juin 2018
Modifié(e) : Stephen23 le 27 Juin 2018
Very neat, but this always contains one 1, whereas the title asks for "...with at most 1", which would include the possibility of zero 1's. This could be solved easily:
randperm(n)==randi(0:1)
Ezz El-din Abdullah
Ezz El-din Abdullah le 27 Juin 2018
Thanks a lot Guillaume and Stephen. Appreciate your help, both :)

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