title: R get value from summary()
body: <p>Please note that my R skills are very poor... I have the DS data structure which looks like this:</p>
  
  <pre><code> loc anno.2013 anno.2014
  1    1       1.9       1.9
  2    2       0.8       1.0
  3    3       1.4       1.0
  4    4       2.4       1.9
  5    5       1.5       1.7
  6    6       2.3       2.2
  7    7       1.0       1.2
  8    8       0.8       1.1
  9    9       1.2       0.9
  10  10       0.7       0.9
  11  11       0.9       1.2
  12  12       1.1       1.5
  </code></pre>
  
  <p>Applying the summary() function to it the I reach the following result:</p>
  
  <pre><code>&gt; s&lt;- summary(loc.dolomiti)
  &gt; s
       loc          anno.2013       anno.2014    
  Min.   : 1.00   Min.   :0.700   Min.   :0.900  
  1st Qu.: 3.75   1st Qu.:0.875   1st Qu.:1.000  
  Median : 6.50   Median :1.150   Median :1.200  
  Mean   : 6.50   Mean   :1.333   Mean   :1.375  
  3rd Qu.: 9.25   3rd Qu.:1.600   3rd Qu.:1.750  
  Max.   :12.00   Max.   :2.400   Max.   :2.200 
  </code></pre>
  
  <p>I need to extract the <code>Min</code> value from the 2nd column (anno.2013), that is 0.7, but both <code>s[7]</code> and <code>s[[7]]</code> commands return the <code>"Min   :0.700  "</code> string.</p>
  
  <p>How to obtain this float value? Thanks</p>