Jeff, I am sorry for that.
On Sat, Apr 15, 2017 at 12:04 AM, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: > 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.
