title: Rescale y axis ggplot (geom_bar)
body: <p>This is should be very simple question! 
  I would like to make a barplot with errorbars and I'm using the following code: </p>
  
  <pre><code>ggplot(data = bars, aes(x=c("1","2","3"), y=V2, fill = names)) + 
    geom_bar(position=position_dodge(), stat="identity", alpha = 0.7) +
    geom_errorbar(aes(ymin=V1, ymax=V3))+
    theme(legend.position='none')+
    coord_cartesian(ylim=c(0,10))
  </code></pre>
  
  <p>However, I have 2 problems: 
  1. I would like the bars to start at y = 0
  2. I don't like the ticks in the y axis. I would like numbers with just one decimal and less ticks. </p>
  
  <p>this is my actual plot: <a href="http://i.stack.imgur.com/GG1aM.jpg" rel="nofollow">Bars with error bars</a></p>