title: What's the best way to classify time text data?
body: <p>This is a straight-forward question:</p>
  
  <p>I have time text data that looks like the following: </p>
  
  <p>110<br/>
  120+<br/>
  50 minutes<br/>
  50 Minutes<br/>
  35-40<br/>
  30<br/>
  1 hour and a half <br/>
  1 hour 20 Minutes<br/></p>
  
  <p>What's the best way to clean this data so that I can analyze it? Is this a job for machine learning? If so, what are the librarys/tools that would help me most in this situation?</p>
  
  <p>One thought is using gsub:</p>
  
  <p>"as.numeric(gsub("([0-9]+).*$", "\1", Timedata))" but that over-simplifies the data.</p>
  
  <p>I would like the data to look like this after cleaning:</p>
  
  <p>110<br/>
  120<br/>
  50<br/>
  50<br/>
  37.5<br/>
  30<br/>
  90<br/>
  80</p>