MATLAB: Random vectorof zeros and 1

Question

Hi,

if I want to generate a random vector of length 1000 where 700 are zeros and 300 are ones how can I do so? I want the zeros and ones to be have a random occurrence in the vector. for example:

A=[ 1 0 1 1 0 1 0 0 .....1] % till observation 1000;

Thanks

Answer 1

A=zeros(1,1000)
A(randperm(1000,300))=1