title: how can i deal with empty matrix: 0-by-any number resulting from simulation?
body: <p>I have made a simulation and the result each time of the simulation is a matrix  and i choose a certain row from the matrix, so if the simulation run=500, i'll have a 500 matrix and ,the row i choose each time will be (at the end of the simulation) 500 rows [one row from the first matrix...last row from the last matrix]...
  the problem is some times a matrix dose not contain the certain row i want , the answer is for example empty matrix: 0-by-6 
  i want to ignor this answer 
  Note: the row i choose is not necessary to be exist in all matrices
  so if     the run=600  , result in 600 matrix , the row i choose maybe =400 only and the other 200 will be zero 
  the simulation STOP when the result is  empty matrix: 0-by-any number
  I use Matlab</p>