3 messages · Elise LIKILIKI, David Winsemius, Jim Lemon
Hello, I have a dataset containing Date Time, Air Temperature, PPFD, Sol Temperature... The first data are false so I would like to extract the other ones. I've tried :
data1<-subset(data,DateTime>=as.POSIXct("2017-01-10
11:00:00",format="%Y-%m-%d %H:%M:%S"),select=c(DateTime,PPFD_Avg,Air_Temp_Avg,RH_Avg,Soil_Temp_Avg)) But I still have 4 rows with data from 2017-01-10 10:00:00 to 2017-01-10 10:45:00 and I don't understand why. Does anyone could help me please. Thanks, Elise LIKILIKI
How are we supposed to help you if you don?t read the Posting Guide and don?t provide any information about the classes of columns in `data`.? ? David.
On Jan 20, 2017, at 10:02 AM, Elise LIKILIKI <elise.likiliki at gmail.com> wrote: Hello, I have a dataset containing Date Time, Air Temperature, PPFD, Sol Temperature... The first data are false so I would like to extract the other ones. I've tried :
data1<-subset(data,DateTime>=as.POSIXct("2017-01-10
11:00:00",format="%Y-%m-%d %H:%M:%S"),select=c(DateTime,PPFD_Avg,Air_Temp_Avg,RH_Avg,Soil_Temp_Avg)) But I still have 4 rows with data from 2017-01-10 10:00:00 to 2017-01-10 10:45:00 and I don't understand why. Does anyone could help me please. Thanks, Elise LIKILIKI [[alternative HTML version deleted]]
______________________________________________ R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD Alameda, CA, USA
Hi Elise,. I would ask: class(data$DateTime) and see if it returns: "POSIXct" "POSIXt" Jim On Sat, Jan 21, 2017 at 3:02 AM, Elise LIKILIKI
Hello, I have a dataset containing Date Time, Air Temperature, PPFD, Sol Temperature... The first data are false so I would like to extract the other ones. I've tried :
data1<-subset(data,DateTime>=as.POSIXct("2017-01-10
11:00:00",format="%Y-%m-%d
%H:%M:%S"),select=c(DateTime,PPFD_Avg,Air_Temp_Avg,RH_Avg,Soil_Temp_Avg))
But I still have 4 rows with data from 2017-01-10 10:00:00 to 2017-01-10
10:45:00 and I don't understand why.
Does anyone could help me please.
Thanks,
Elise LIKILIKI
[[alternative HTML version deleted]]
______________________________________________ R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.