[R] choose between dates and times

[bogdan romocea]

If happenat is not a datetime value, convert it with strptime(). Then,
one solution is to transform it in the following way:
num.time <- as.numeric(format(happenat,"%Y%m%d%H%M%S"))
This way, 07/22/05 00:05:14 becomes 20050722000514, and you can subset
your data frame with
dfr[which(num.time >= 20050725153000 & num.time <= 20050726123000),]
hth,
b.


> -----Original Message-----
> From: Kerry Bush [mailto:kerryrekky at yahoo.com] 
> Sent: Tuesday, July 26, 2005 3:54 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] choose between dates and times
> 
> 
> Dear R-helpers,
>   I have the following data:
> 
>  y    happenat                 x
> 5185 (07/22/05 00:05:14)       14
> 5186 (07/22/05 00:15:14)       14
> 5187 (07/22/05 00:25:14)       14
> 5188 (07/22/05 00:35:14)       14
> ......
> 
> I want to choose between 07/25/05 15:30:00 and
> 07/26/05 12:30:00. Anybody had experience in handling
> this kind of data? Is there a simple way to subset by
> the variable 'happenat'? Thanks.
> 
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