R help - Nov 2013 - how to compute correlation between times (with buffer before and after times)?

Dear forum members:
 
I have two series of times to correlate. Additionally, I have
to allow for a buffer before and after the times so that they can be within 20
seconds
of each other and not seem discordant. 


Example of my data:


Time 1 Time 2 
9:26 9:26 
10:31 10:29 
9:22  
9:35 9:35 
9:38 9:37 
9:28 9:28 
9:17 9:16 
9:34 9:34 
9:08 9:07 
 
Thanks,
Julia
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