Hello out there....
Again I have a problem and I stuck...
How can I sort a vector of dates?
A look at ?sort could help...
For example I have the vector
a<-ISOdate(2001, 1, 1) + 70*86400*runif(10)
How can this vector be sorted chronological?
a is : [1] "2001-03-05 10:48:42 CET" "2001-01-30 09:29:32 CET" [3] "2001-02-12 11:15:02 CET" "2001-03-07 23:58:43 CET" [5] "2001-01-16 08:02:11 CET" "2001-02-25 00:52:20 CET" [7] "2001-01-04 21:34:45 CET" "2001-01-30 09:37:40 CET" [9] "2001-02-05 19:10:17 CET" "2001-01-09 17:41:49 CET"
sort(a) does just what you wanted without any option - I still advise you to have a close look at ?sort
And what's the function I should work with to handle these entries? (in sense of: which(a>2001-01-04) or somehting like that)
You have to convert with ISOdate the date you want to compare with the ones in the vector. For example,
d<-ISOdate(2001,2,1)
then you can do things like :
aa<-a[a<d]
See ?ISOdate
Thank you for helping
M.Kirschbaum
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