title: Nearest Neighbors algorithm with timestamp
body: <p>I have a .txt file with 3 dimensions. X,Y,time. My file looks something like this: "10 10 12:00" with many more points and times under it. I have found the Nearest points with just the X,Y values but now I need help finding the Nearest Neighbors with time involved.</p>
  
  <p>For example, "what's the closest point to "10 10"? I have a point in my file that is "11 11", which is the closest point.</p>
  
  <p>Now with time added:</p>
  
  <p>What is the closest point to "10 10 12:00": is it "11 11 22:00" or is it "15 15 12:05". My format is "Xvalue, Yvalue, Time".</p>