title: How do I make the y-axis intersect the x-axis at 0 in ggplot2?
body: <p>So when I make plots sometimes I see the y crossing x at some offset. I generated this figure using:</p>
  
  <pre><code>ggplot(data=d2,aes(y=log10(Nems+1),x=Time)) +
    geom_point(size=3,shape=1) +        
    geom_line(data=d2,aes(x=time_model,y=log10(value),group=variable,linetype=variable)) +
    ylim(0.001,2) + no_bg + draw_axis
  </code></pre>
  
  <p>I end up manually moving the y in Illustrator. Is there a way to just do it here?</p>
  
  <p><a href="http://img816.imageshack.us/img816/7633/testzh.png">alt text http://img816.imageshack.us/img816/7633/testzh.png</a></p>