How to select vectors from a set of vectors

Hello all, Suppose I have a set of vectors where

My query is how can we select any vector from set 𝒥and form a matrix of dimension 5 by 500, where 5 corresponds to dimesion of such that n is from 1 to 8 and 500 corresponds to 500 's.

Any help in this regard will be highly appreciated.

[Jan]

Your x[n] have the dimension 5. You have 8 of them. Therefore I'm confused by your 8 and 500.

What is the purpose to select "any vector"? Do you ask for the vertcat command?

If the x[n] are binary vectors, 500 of them with 8 elements cannot be unique: 2^8=256.

[charu shree]

Thank you so much sir for your response.

By mistake I had written 8 by 500. Now its corrected . It should be 5 by 500.

Also, the purpose to select any vector is that from a set we can choose any vector.

Answer 1

[David Hill]

x=[1 1 1 1 0 0 0 0;1 0 0 0 1 1 1 0;0 1 0 0 1 0 0 1;0 0 1 0 0 1 0 1;0 0 0 1 0 0 1 0];
r=randi(8,1,500);
y=x(:,r)

y = 5×500

0 1 0 0 0 1 1 0 1 0 1 0 0 0 0 1 1 1 0 0 0 1 0 1 0 1 1 0 0 0 0 0 1 0 0 0 0 1 0 1 0 1 1 0 0 0 0 1 1 1 1 0 1 0 1 0 0 1 1 0 1 0 1 1 1 0 0 0 1 0 0 0 0 1 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 1 1 1 0 1 1 0 0 0 0 0 1 0 1 1 1 0 0 0 1 0 0 1 0 0 1 0 1 1 0 1 0 0 0 0 0 1 1 1 0 1 0 1 0 0 0 1 0 0 0 1 1 0 0 1 0 1 0 0 1 0

[charu shree]

Thank you so much sir for your detailed answer...