title: R barchart, not barplot, remove yaxis ticks
body: <p>I am trying to remove the y-axis ticks from a barchart. </p>
  
  <p>google immediately corrects barchart to barplot, and is not helpful at all.</p>
  
  <p>yaxt="n" is not working with barchart...</p>
  
  <p>Anyone have an idea how to remove the yaxis ticks in barcharts in R?</p>
  
  <p>I need barchart because this is the only way I could find that works for me to group my data in the way I want it...</p>
  
  <p>An MWE is here:</p>
  
  <pre><code> library(lattice)
  
   molnames&lt;-c("A","B","D","G","C","F")
   contactcounts&lt;-c(1,2,3, 6,12,18,4,8,16,10,20,30,2,4,8,3,6,9)
  
   Acolumn1=factor(rep(molnames, each=3), levels=molnames )
   Acolumn2=rep(c("test1","test2","test3"), 6)
   Acolumn3=contactcounts
   colour&lt;-c("orange", "blue","magenta")
   tiff(file="./testingABC.tiff", res=1000, width = 8, height = 8,units='in')
   trellis.par.set("grid.pars"=list(fontfamily="serif"))
   barchart(Acolumn3 ~ Acolumn1,ylab="y axis", yaxt="n", groups=Acolumn2,  auto.key = list(columns = 3),  par.settings=list(superpose.polygon=list(col=colour)))
  </code></pre>