title: how to change the type of ggplot graphic
body: <p>I have the data frame (for example) </p>
  
  <pre><code>df &lt;-data.frame(apport=c("Org 2016","Min 1","Min 2","Min 3"), 
                  Aou_14=c(7.69,0,0,0), Sep_16=c(7.69,0,0,0),Sep_17=c(15.38,0,0,0),
                  Oct_18=c(46.15,0,0,0),Oct_19=c(7.69,0,0,0),Nov_20=c(15.38,0,0,0),
                  Fev_27=c(0,50,0,0),Mar_28=c(0,50,0,0), Mar_29=c(0,0,62.5,0),
                  Avr_30=c(0,0,25,0),Avr_31=c(0,0,12.5,0),Mai_32=c(0,0,0,50),
                  Mai_33=c(0,0,0,50))
  
  
   list&lt;-c("Jan_0", "Jan_1", "Fev_2", "Fev_3","Mar_4", "Mar_5", "Avr_6", "Avr_7", "Mai_8", "Mai_9", "Jui_10", "Jui_11", "Jul_12", "Jul_13", "Aou_14", "Aou_15", "Sep_16", "Sep_17", "Oct_18", "Oct_19", "Nov_20","Nov_21", "Dec_22", "Dec_23", "Jan_24", "Jan_25", "Fev_26", "Fev_27", "Mar_28", "Mar_29", "Avr_30","Avr_31", "Mai_32", "Mai_33", "Jui_34", "Jui_35", "Jul_36", "Jul_37", "Aou_38", 
       "Aou_39", "Sep_40", "Sep_41", "Oct_42", "Oct_43", "Nov_44", "Nov_45", "Dec_46", "Dec_47")
  </code></pre>
  
  <p>I used ggplot to have a bar chart </p>
  
  <pre><code>p1 &lt;- ggplot(dates2, aes(x=periode_ap, y=pourcentage_parc, fill=apport))+
          geom_col(position = position_stack(reverse = TRUE))+
          ylim(0,100)+
          scale_fill_manual(values=mycolors, name="")+
          theme_light()+scale_x_discrete(labels = list)
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/FNgKi.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FNgKi.png" alt="enter image description here"></a></p>
  
  <p>what I must do if I want to get a best graphic like this one where I can see the superposition between bars, thanks    ?????
  <a href="https://i.stack.imgur.com/mIQcz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mIQcz.png" alt="enter image description here"></a></p>