title: Change cell color if the two values of this cell have opposite signs in Pretty tables in Julia
body: <p>How to change cell color if the two values of this cell have opposite signs in Pretty tables in Julia below is my code and the table is attached.</p>
  <p>names = string.(-1/1:1/4:1/1)
  pretty_table(AStrings , header = ([-1,-3/4, -1/2, -1/4, 0, 1/4, 1/2, 3/4, 1]), row_names= names)</p>
  <p><a href="https://i.stack.imgur.com/OesrA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OesrA.png" alt="enter image description here" /></a></p>