title: How do I put plus or minus sign as an x-axis label on a Matlab plot?
body: <p>For Matlab plots, how do I place plus or minus sign as X tick labels in a Matlab plot? </p>
  
  <p>Currently, I'm using these lines of code but I would like to obtain plus-minus sign (±) values preceding a numerical value on the x tick labels.</p>
  
  <p>x_values = ['+/- 1';'+/- 2'];<br>
  set(gca,'XTickLabel',x_values)</p>