title: Why stringsasFactors= FALSE is used in this R code?
body: <p>1.In this R code why stringsAsFactors = FALSE is used ?</p>
  
  <pre><code>       # Create the data frame.
           emp.data &lt;- data.frame(
           emp_id = c (1:5), 
           emp_name = c("Rick","Dan","Michelle","Ryan","Gary"),
          salary = c(623.3,515.2,611.0,729.0,843.25), 
  
          start_date = as.Date(c("2012-01-01", "2013-09-23", "2014-11-15", "2014-05- 11","2015-03-27")),
          stringsAsFactors = FALSE
      )
  # Print the data frame.         
          print(emp.data)
  </code></pre>