title: barplot with two values on the same column
body: <p>I have the following graphic:</p>
  <p><a href="https://i.stack.imgur.com/rkysl.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rkysl.png" alt="enter image description here" /></a></p>
  <p>But I need it to be like this:</p>
  <p><a href="https://i.stack.imgur.com/wzDVo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wzDVo.png" alt="enter image description here" /></a></p>
  <p>My code is:</p>
  <pre><code>n_papers&lt;-c(6,4,5,1,6,2,1)
  paper_ui&lt;-c(3,2,4,0,1,1,0)
  methods&lt;-c(&quot;AR&quot;,&quot;ARMA&quot;,'ARIMA',&quot;SARIMA&quot;,&quot;Loess \n decomposition&quot;,&quot;Classical \n decomposition&quot;,&quot;Exponential \n smoothing&quot;)
  df &lt;- data.frame(n_papers,paper_ui,methods)
  
  ggplot(df) +
    aes(x = methods, y = n_papers,fill=paper_ui) +
    geom_bar(show.legend = FALSE,stat=&quot;identity&quot;,position = &quot;dodge&quot;)+
    labs(x=NULL, y = &quot;Number of papers&quot;) +
    theme_bw()+
    theme(panel.border = element_blank(), panel.grid.major = element_blank(),
          panel.grid.minor = element_blank(), axis.line = element_line(colour = &quot;black&quot;))
  </code></pre>
  <p>And I need the blue to be the same to all the bars color=&quot;dodgerblue4&quot;. Thank you for the help!</p>