On Mon, 06-Jan-2014 at 07:38PM +0000, William Dunlap wrote: |> You could compare the outputs of |> z1 <- with(dd, dd$EVYEAR==2012 & dd$EVMONTH=='02')
Wouldn't with(dd, EVYEAR==2012 & EVMONTH=='02') be sufficient when using with()? |> (which is like subset()) and that of |> z2 <- dd$EVYEAR==2012 & dd$EVMONTH=='02' |> (evaluated from within the same context) with |> table(z1, z2, exclude=NULL) |> That may show something useful. |> |> Bill Dunlap |> Spotfire, TIBCO Software |> wdunlap tibco.com |> |> |> > -----Original Message----- |> > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf |> > Of Walter Anderson |> > Sent: Monday, January 06, 2014 11:17 AM |> > To: Sarah Goslee |> > Cc: R Help |> > Subject: Re: [R] Is this a bug or am I making a mistake? |> > |> > On 01/06/2014 11:14 AM, Sarah Goslee wrote: |> > > Hi Walter, |> > > |> > > I can't reproduce your results. Please provide some data that |> > > demonstrates the problem. |> > > |> > > http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible- |> > example |> > > |> > > subset() and [ differ in their handling of NA values, and you don't |> > > need the dd$ in the arguments to subset(). |> > > |> > > But those don't explain your result given the information provided. |> > > Please provide more information. |> > > |> > > Sarah |> > > |> > > |> > > On Mon, Jan 6, 2014 at 12:06 PM, Walter Anderson <wandrso...@gmail.com> wrote: |> > >> I have a data frame that I am extracting some records from and noticed the |> > >> following issue |> > >> |> > >> I originally used tmp <- subset(dd, dd$EVYEAR==2012 & dd$EVMONTH=='02') |> > >> |> > >> and noticed that I wasn't ending up with all of the records I should have; |> > >> however, when I used |> > >> |> > >> tmp <- dd[dd$EVYEAR==2012 & dd$EVMONTH=='02',] |> > >> |> > >> I did get all of the records I should have. |> > >> |> > >> I thought the two forms were equivalent, am I mistaken? |> > >> |> > Thanks everyone for the response. I didn't provide a reproducible test, |> > since the data I experienced this issue with was quite large (> 40MB) |> > and I have not been able to reproduce the problem with any other data |> > set. I have also performed the subset using Microsoft Access on the |> > original dbf file I use for the data frame and confirmed that the second |> > query format (dd[QUERY,]) is producing the correct results. It doesn't |> > appear that any of the impacted (or any in the data frame) contain NA |> > records. |> > |> > I am not really looking for any particular solution, but was surprised |> > by the different results from what I presumed to be the same query. If |> > it is believed to be a possible bug, I would be glad to package up the |> > data that is generating the issue, but not sure where to place such a |> > large data set. |> > |> > ______________________________________________ |> > R-help@r-project.org mailing list |> > 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 |> 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. -- ~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~. ___ Patrick Connolly {~._.~} Great minds discuss ideas _( Y )_ Average minds discuss events (:_~*~_:) Small minds discuss people (_)-(_) ..... Eleanor Roosevelt ~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~. ______________________________________________ R-help@r-project.org mailing list 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.
