[R] remove rows ??

[skan]

Now it works
I was reading from a file
DF <- read.table("prueba.txt")
DF[!as.POSIXlt(DF$V1)[['min']] %% 10,]
didn't do anything, then I tried 
zz[!as.POSIXlt(zz$V2)[['min']] %% 10,]
that caused an error
Error en as.POSIXlt.character(as.character(x)) : 
  character string is not in a standard unambiguous format

what if you use zoo and chron instead?
I say that because I'd like to make more computation later with zoo.

and what I relly need is 
to keep the last data in each 15min piece. Giving it a 15min time format
commonly I'll have one data every 5 min, but sometimes some could be missing
or not be a 5min multiple.

2005-01-03 09:04 0.01   -> ignore because the next one is nearer to 15
2005-01-03 09:05 0.02   ->  2005-01-03 09:15 0.02   
2005-01-03 09:24  0.03  ->   2005-01-03 09:30  0.03

-- 
View this message in context: http://r.789695.n4.nabble.com/remove-rows-tp2328312p2328517.html
Sent from the R help mailing list archive at Nabble.com.