title: Boxplot in ggplot2 giving garbage
body: <p>Hi I have the following data frame of weather data: </p>
  
  <pre><code>&gt; head(tab)
    month day hour min tempi hum precip_ratei         pws observationTime
  1    03  09   00  01  51.8  80       -99.99 KCASANFR291               1
  2    03  09   00  21  52.0  80       -99.99 KCASANFR291               2
  3    03  09   00  41  51.8  80       -99.99 KCASANFR291               3
  4    03  09   01  02  51.6  80       -99.99 KCASANFR291               4
  5    03  09   01  21  51.6  80       -99.99 KCASANFR291               5
  </code></pre>
  
  <p>with</p>
  
  <pre><code>&gt; unique(tab$pws)
   [1] "KCASANFR291" "KCASANFR58"  "KCASANFR328" "KCASANFR49"  "KCASANFR131" "KCASANFR371" "KCASANFR142" "KCASANFR384"
   [9] "KCASANFR326" "KCASANFR231" "KCASANFR335" "KCASANFR259" "KCASANFR366" "KCASANFR367" "KCASANFR354" "KCASANFR394"
  [17] "KCASANFR357" "KCASANFR299" "KPCASANF2"   "KCASANFR114" "KCASANFR404" "KCASANFR355" "KCASANFR314" "KCASANFR297"
  [25] "KCASANFR343" "KCASANFR327" "KCASANFR317" "KCASANFR236" "KCASANFR79" 
  </code></pre>
  
  <p>Now I am trying to plot it using ggplot2 boxplot using the following code but it's giving the weird picture bellow. Could you say why this is the case? </p>
  
  <pre><code>library(ggplo2)
  p &lt;- ggplot(tab, aes_string(y = "tempi", x ="pws"))
  p + geom_boxplot()
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/1qkHu.jpg" alt="enter image description here"></p>
  
  <p>Also, is it something to do with the axis values?</p>