DPlot

I have periodic readings of a device, usually taken one to many days apart. Here are the times so far:
3/15/10 19:09
3/23/10 7:43
3/31/10 8:45
4/1/10 8:05
4/2/10 8:44
4/5/10 8:13
4/6/10 8:10
4/9/10 8:47
4/17/10 9:38
4/20/10 18:07
4/23/10 7:42
5/2/10 12:00
5/11/10 21:37
5/13/10 22:18
5/15/10 15:43
5 ...