title: ggplot to add space in between group
body: <p>I am working on this hazard ratio chart, using ggplot function and hope you guys could help. I am trying to add the space in between the group “Income” and “Region” . There is function called position_dodge, but I still not quite get it yet. See the image below for the layout. I'm trying to get something liekt that.  Thanks in advance for help~! here is my current code, and the position_dodge not helping with adding space right now</p>
  
  <p><img src="https://i.stack.imgur.com/JN2CQ.png" alt="enter image description here"></p>