title: Issues with summation in ggplot2 using geom_bar
body: <p>I am having a hard time graphing with R. I want my bar graph to aggregate the <code>deal_count</code> column, but it does not appear to be doing that. Not quite sure what I am missing here.
  The <code>deal_count</code> values are 'integer'. I have attempted to sum the column with different classes but no luck.</p>
  
  <p>Also just running this</p>
  
  <pre><code>sum(funded.agvc$deal_count)
  </code></pre>
  
  <p>Does not yield the proper sum.....</p>
  
  <pre><code>ggplot(data=funded.agvc, aes(moved_date,deal_count)) + 
     geom_bar(colour='black', fill="#33CC00", alpha=.5, 
        size=0, width=.7,stat='identity') + xlab("Deal Funded Date") + 
     ylab("Funded Deal Count") + 
     opts(title="Deals funded since January 2011") + 
     facet_grid(grouptype~fundingstage, scales='free_y') + 
     opts(axis.text.x =theme_text(angle=45, size=5))
  </code></pre>
  
  <p>Here's the head</p>
  
  <pre><code>head(funded.agvc)
  moved_date                   industry  fundingstage deal_count startup_country startup_state                  group_name   grouptype
  1    2012-09  MEDICAL_DEVICES_EQUIPMENT       500k-1M          1              CA                      Boston Harbor Angels Angel Group
  2    2012-10 BUSINESS_PRODUCTS_SERVICES Product Ready          1              US            MA     Launchpad Venture Group Angel Group
  3    2012-07                                  Not Set          1              US                              Golden Seeds Angel Group
  5    2012-09                IT_SERVICES Product Ready          1              US            NY          STAR Angel Network Angel Group
  6    2012-11                     MOBILE Product Ready          1              US            TX Central Texas Angel Network Angel Group
  7    2012-11                                  Not Set          2                                              NEST-TN, LLC Angel Group
  </code></pre>
  
  <p>And session info</p>
  
  <pre><code>R version 2.15.1 (2012-06-22)
  Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
  
  locale:
  [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
  
  attached base packages:
  [1] stats     graphics  grDevices utils     datasets  methods   base     
  
  other attached packages:
  [1] JavaGD_0.6-1  scales_0.2.3  rJava_0.9-3   ggplot2_0.9.3
  
  loaded via a namespace (and not attached):
   [1] colorspace_1.1-1   dichromat_1.2-4    digest_0.5.2       grid_2.15.1        labeling_0.1       MASS_7.3-18        memoise_0.1        munsell_0.3        plyr_1.7.1        
  [10] proto_0.3-9.2      RColorBrewer_1.0-5 reshape2_1.2.1     stringr_0.6.1      tools_2.15.1    
  </code></pre>
  
  <p>And the dput</p>
  
  <pre><code>structure(list(moved_date = c("2012-09", "2012-10", "2012-07", 
  "2012-09", "2012-11", "2012-11"), industry = c("MEDICAL_DEVICES_EQUIPMENT", 
  "BUSINESS_PRODUCTS_SERVICES", "", "IT_SERVICES", "MOBILE", ""
  ), fundingstage = c("500k-1M", "Product Ready", "Not Set", "Product Ready", 
  "Product Ready", "Not Set"), deal_count = c(1L, 1L, 1L, 1L, 1L, 
  2L), startup_country = c("CA", "US", "US", "US", "US", ""), startup_state = c("", 
  "MA", "", "NY", "TX", ""), group_name = c("Boston Harbor Angels", 
  "Launchpad Venture Group", "Golden Seeds", "STAR Angel Network", 
  "Central Texas Angel Network", "NEST-TN, LLC"), grouptype = c("Angel Group", 
  "Angel Group", "Angel Group", "Angel Group", "Angel Group", "Angel Group"
  )), .Names = c("moved_date", "industry", "fundingstage", "deal_count", 
  "startup_country", "startup_state", "group_name", "grouptype"
  ), row.names = c(1L, 2L, 3L, 5L, 6L, 7L), class = "data.frame")
  </code></pre>