You don't follow instructions very well. Read the Posting Guide more carefully. -- Sent from my phone. Please excuse my brevity.
On April 14, 2017 9:39:30 PM PDT, Ashta <sewa...@gmail.com> wrote: >DF1 is a data frame. I am suspecting there might be non date value >in that column. My question is how to remove a non date values from > that field. >example if Alex152 has 12253,. This value is not a date format. > > >On Fri, Apr 14, 2017 at 11:24 PM, Bert Gunter <bgunter.4...@gmail.com> >wrote: >> Show us str(DF1) . It is not a data frame. >> >> -- Bert >> >> >> >> >> On Fri, Apr 14, 2017 at 9:02 PM, Ashta <sewa...@gmail.com> wrote: >>> Hi all, >>> I am reading a field data that contains several variables. The >sample >>> of the data with the first two variables is shown below. I wanted >to >>> know the minimum and maximum recording date However, I have some >>> problem. >>> >>> >>> Name Rdate V1 to V20 >>> Alex1 01/03/2015 >>> Alex2 01/03/2014 >>> Alex3 31/12/2012 >>> Alex4 15/01/2011 >>> Alex150 22/01/2010 >>> Alex151 15/02/2011 >>> >>> >>> >>> DF1=DF1[!is.na(DF1$Rdate),] >>> range(DF1$Rdate, na.rm=TRUE) >>> >>> Warning message: >>> In is.na(DF1$Rdate) : >>> is.na() applied to non-(list or vector) of type 'NULL' >>> Error in DF1$Rdate : $ operator is invalid for atomic vectors >>> Execution halted >>> >>> I am expecting the Rdate field should contain recording dates. I >am >>> suspecting there might be a non date value in that columns. How do >I >>> remove that row if it is not a date format? >>> >>> >>> Thank you. >>> >>> ______________________________________________ >>> R-help@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. > >______________________________________________ >R-help@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. ______________________________________________ R-help@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.
