title: Using R to draw a time series with discrete data
body: <p>Greetings,</p>
  
  <p>I have a table that looks like the following:</p>
  
  <pre><code>      date value
  2007-11-05 134
  2007-12-08 234
  2008-03-10 322
  2008-03-11 123
  ...
  </code></pre>
  
  <p>In summary, it has daily values for three years, but it doesn't have values for every day. What I need is to draw a line chart plot(data$date, data$value) for the whole time span, but considering that, for those days the table doesn't specify a value, it should assume the last known. In other words, the table only has values in the days that it changed.</p>
  
  <p>Any R experts out there that can give me an hand? :-)</p>
  
  <p>Thanks in advance!</p>