R help - Jun 2011 - Subtracting TimeStamps

Hi All,,

I am new to R and having a problem dealing with timestamps.

I have 2 columns in my table . Both of these have timestamps value in
format  06/22/11 05:34 PM . I want to calculate the difference in these 2
columns ( in minutes) and save it as a 3rd column.

Can anyone help ?

Thanks
Sumit

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On Jun 23, 2011, at 7:26 AM, sumit gupta wrote:
> Hi All,,
>
> I am new to R and having a problem dealing with timestamps.
>
> I have 2 columns in my table . Both of these have timestamps value in
> format  06/22/11 05:34 PM .
If these are Date or DateTime objects you can use:

?difftime   # with attention to the units argument
?DateTimeClasses

If they are not yet in a correct class you need to first use:

?strptime
> I want to calculate the difference in these 2
> columns ( in minutes) and save it as a 3rd column.
When examples are provided ....

-- 
David Winsemius, MD
West Hartford, CT