title: How to scale int values in R between 0 and 100
body: <p>How can I scale INT values in a data frame to values from 0 to 100? For Example this DF:</p>
  
  <pre><code>&gt; employee &lt;- c('John Doe','Peter Gynn','Jolie Hope')
  &gt; value &lt;- c(1, 3, 365)
  &gt; startdate &lt;- as.Date(c('2010-11-1','2008-3-25','2007-3-14'))
  &gt; employ.data &lt;- data.frame(employee, value, startdate)
  &gt; employ.data$value &lt;- as.integer(employ.data$value)
  </code></pre>
  
  <p>How can I scale the value to a range between 0 and 100. The threshold should be 50.
  So my output should look like this:</p>
  
  <pre><code>&gt; employ.data
  employee value  startdate
  1   John Doe  1 2010-11-01
  2 Peter Gynn  3 2008-03-25
  3 Jolie Hope  100 2007-03-14
  </code></pre>