title: model to Forecast an hourly time series
body: <p>I am working on sales data of a vending machine. It consists of sale and time of sale. I am working on predicting sales on the next day on hourly basis.
  <strong>My work</strong>: I have created an hourly time series with sales during the interval summed up. It looks like this</p>
  
  <pre><code>head(sales)
  
                      [,1]
  
  2015-12-01 00:00:00    0
  
  2015-12-01 01:00:00    0
  
  2015-12-01 02:00:00    0
  
  2015-12-01 03:00:00    0
  
  2015-12-01 04:00:00    0
  
  2015-12-01 05:00:00  280
  
  class(sales)
  [1] "xts" "zoo"
  </code></pre>
  
  <p>I observe there is a pattern in sales over a day and also over a week. I tried using ets but cannot interpret the results. an outcome with predictions of next day sales is what i am looking for.
  Thank you</p>