title: Is it possible to put space between stacks in ggplot2 stacked bar?
body: <p>I took this example from <a href="https://stackoverflow.com/questions/21236229/ggplot2-stacked-bar-chart">here:</a></p>
  
  <pre><code>DF &lt;- read.table(text="Rank F1     F2     F3
  1    500    250    50
  2    400    100    30
  3    300    155    100
  4    200    90     10", header=TRUE)
  
  library(reshape2)
  DF1 &lt;- melt(DF, id.var="Rank")
  
  library(ggplot2)
  ggplot(DF1, aes(x = Rank, y = value, fill = variable)) + 
  geom_bar(stat = "identity")
  </code></pre>
  
  <p>Is it possible to create a stacked bar such as the following graph using ggplot2? I do not want to differentiate stacks by different colors.</p>
  
  <p><img src="https://i.stack.imgur.com/dwvvL.png" alt="enter image description here"></p>
  
  <p><strong>EDIT:</strong> Based on Pascal's comments,</p>
  
  <pre><code>ggplot(DF1, aes(x = Rank, y = value)) + 
  geom_bar(stat = "identity",lwd=2, color="white")
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/OpsEa.png" alt="enter image description here"></p>
  
  <p><em>I still have the white borders for the bars.</em> </p>