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.
