[R] lapply and Two TimeStamps as input

[Pete Brecknock]

alaios wrote:
> 
> Dear all,
> 
> I have a function that recognizes the following format for timestamps
> "%Y-%m-%d %H:%M:%S"
> 
> my function takes two input arguments the TimeStart and TimeEnd
> I would like to help me create the right list with pairs of TimeStart and
> TimeEnd which I can feed to lapply (I am using mclapply actually). 
> For every lapply I want two inputs to be fed to my function. I only know
> how to feed one input to the lapply
> 
> Could you please help me with that?
> I would like to thank you in advance for your help
> 
> B.R
> Alex
> 	[[alternative HTML version deleted]]
> 
> 
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> 

Is this of any use?

# Data in list - first time is start time, second time is end time
myListStartEnd = list(c(strptime("2010-01-01 09:00:00","%Y-%m-%d %H:%M:%S"),
                        strptime("2011-01-01 11:30:00","%Y-%m-%d
%H:%M:%S")),
                      c(strptime("2010-12-01 10:00:00","%Y-%m-%d %H:%M:%S"),
                        strptime("2010-12-25 06:00:00","%Y-%m-%d
%H:%M:%S")))

lapply(myListStartEnd,function(x) x[2]-x[1])

# Output
[[1]]
Time difference of 365.1042 days

[[2]]
Time difference of 23.83333 days

HTH

Pete

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