title: Adding axis labels to multcompview constrast plots
body: <p>I have been using package multcompview to be able to visually display the significant differences among groups based on anova and HSD tukey tests:</p>
  
  <pre><code>Group=c("G1","G1","G1","G1","G2","G2","G2","G2","G3","G3","G3","G3")
  set.seed(0)
  Vals=c(runif(4),runif(4)+0.7,runif(4)-0.7)
  data=data.frame(Group)
  data=cbind(data, Vals)  
  library(multcompView)
  xzx &lt;-multcompBoxplot(Vals~Group,data=data,sortFn=median,  decreasing=FALSE,    
                    horizontal=FALSE,
                    plotList=list(
                      boxplot=list(fig=c(0,  1,  0,  1),  las=3,
                                   cex.axis=1.5),                      
                      multcompLetters=list(
                        fig=c(0.87,  0.97,  0.115,  0.923), #0.1108, 0.9432 Top of     
                        #page 18 manual for very convoluted explanation (c(y bottom, y top,x L, x R))
                        type='Letters') ) )
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/Lri3Q.png" alt="enter image description here"></p>
  
  <p>Here is one exampel of one of my actual graphs:
  <img src="https://i.stack.imgur.com/Uqvl9.jpg" alt="enter image description here">
  The approach (which I found after posting a related question in SO) works really well, but I have not found a way to be able to add a y axis label (I need to label the Y variable "ranked vulnerabity"). The multcomp function does not seem to take in an ylab argument.
  It is frustrating to have these overall good looking contrast graphs without basic axis label information…
  Do you know of a solution/ workaround for this problem? </p>