[R] Military Time Comparison

[David Winsemius]

On Feb 26, 2012, at 10:31 PM, Edgar Alminar wrote:

> Hello All,
> I have this dataset:
>
>    RID VISCODE      SCRNO RECNO AEWHEN   AEONDATE AEONTIME  
> INFPOINT.x  INFDATE.x INFTIME.x INFPOINT.y  INFDATE.y INFTIME.y
> 1   100     w00 IGI1480069     4      2 09/15/2009     1118           
> 1 09/15/2009       947         14         -4      1117
> 2   100     w00 IGI1480069     8      2 09/15/2009     1132           
> 1 09/15/2009       947         14         -4      1117
> 3   100     w00 IGI1480069     5      2 09/15/2009     1125           
> 1 09/15/2009       947         14         -4      1117
>
>
>
> I have AEONTIME, INFTIME.x, and INFTIME.y, and they are all military  
> times.
> I'm trying to do a comparison like this:
>
> match2 = subset(match2, AEONTIME < INFTIME.x)
>
> But it's not working correctly.

Define what you expected. In the sample you offered none of those  
logical comparisons would be true so you should get a dataframe with  
zero rows. (And since you gave the result the same name, you have  
basically wiped out match2.)


> How do I do this? :-)

Do what?

-- 

David Winsemius, MD
Heritage Laboratories
West Hartford, CT