title: Multiple error bars add to columns in error on barplot in ggplot2
body: <p>I am simply trying to add error bars to a side by side bar plot using ggplot. I think data is arranged correctly as per below. I want to graph differences in fecundity between inbred and outbred 
  populations derived from populations with (+SS) and without (-SS) sexual selection.</p>
  
  <pre><code>       inbreeding  SS       Fecundity      se
  1      Inbred      +SS      5.60      0.8596205 
  2      Inbred      +SS      7.40      1.1639316 
  3      Inbred      +SS      6.25      1.2457824 
  4      Inbred      +SS      1.40      0.1854050 
  5     Outbred      +SS      7.70      1.2377824 
  6     Outbred      +SS      6.30      0.6613384 
  7     Outbred      +SS      2.35      1.0137865 
  8     Outbred      +SS      8.27      1.2775966 
  9      Inbred      -SS      9.15      1.7595977 
  10     Inbred      -SS     12.50      1.7464249 
  11     Inbred      -SS     10.95      1.9063260 
  12     Inbred      -SS      3.65      1.2036676 
  13    Outbred      -SS      7.65      1.5564382 
  14    Outbred      -SS      9.10      1.5250539 
  15    Outbred      -SS      5.75      1.3315503
  16    Outbred      -SS      3.65      0.9821432
  </code></pre>
  
  <p>The code I am using for making the plot is</p>
  
  <pre><code>ggplot(Inbreeding27Means.ggplot,aes(x=SS,y=Fecundity,fill=inbreeding))+
  geom_bar(stat="identity",position=position_dodge())+
  geom_errorbar(aes(ymin=Fecundity-se,ymax=Fecundity+se),width=.2,
    position=position_dodge(.9))
  </code></pre>
  
  <p>Which generally came from the R cookbook website <a href="http://www.cookbook-r.com/Graphs/Plotting_means_and_error_bars_(ggplot2)/#Helper%20functions" rel="nofollow">here</a> </p>
  
  <p>What appears to happen is that multiple error bars within each column/bar are added for each group of my grouping variable (inbreeding) ( I think). Sorry my reputation is not quiet high enough to add a picture. So I hope code is clear. The side by side bar graphs on the R cookbook website is essentially what I am aiming for except my variable (SS) on x-axis has only two groups. </p>
  
  <p>Obviously I'd like to just have one error bar per bar on the plot. If someone could suggest what I may have done wrong here i'd much appreciate it. </p>