title: MATLAB: Best way to map integers to color strings
body: <p>I have a list of integers that represent labels for a predictor. The list is size 2000 and contains {1,2,3,4}. How can I map these numbers to a cell array of strings that contains the values {'red','blue','green','black'}, respectively, without using loops? </p>
  
  <p>I tried containers.Map, but apparently this doesn't work for vectors.</p>