title: How to create a Matlab matrix (100 x 100) with random distribution of numbers 1 and 3, when each column must have 10% of 1 and 90% of 3?
body: <p>How can I create in Matlab a matrix (100 x 100) with random distribution of numbers 1 and 3, when in each column I must have 10% of numbers 1 and 90% of numbers 3? this must be random distribution.</p>
  
  <p>Anyone could help me?</p>
  
  <p>Thanks a ton!</p>