Thanks - that's solves my problems.

All the best - Trevor


On Wed, Jan 29, 2014 at 2:28 PM, Ista Zahn <istazahn@gmail.com> wrote:

> Hi Trever,
>
> See help("::") and help("detach")
>
> Best,
> Ista
>
> On Wed, Jan 29, 2014 at 5:19 PM, Trevor Davies <davies.trevor@gmail.com>
> wrote:
> > I think I have a hole in my understanding of how R uses packages (or at
> > least how it gives functions in packages priority).  I thought I would
> give
> > the new dplyr package a test drive this morning (which is blazingly fast
> > BTW) and I've gone down the rabbit hole.
> >
> > The issue is that I'm unable to use both plyr and dplyr in a program that
> > I'm writing.  When I initially install dplyr and I look at the summarise
> > function everything works great but if I then install the plyr package
> the
> > summarise function from dplyr is then masked with the plyr summarise
> > function taking priority.  I can't seem to figure out a way to get the
> > dplyr summarise to become the main function...
> >
> > What am I missing here? Can you not use the dplyr and plyr packages at
> the
> > same time?
> >
> >
> > Example:
> > =========================
> >> require(dplyr)
> > Loading required package: dplyr
> >
> > Attaching package: 'dplyr'
> >
> > The following objects are masked from 'package:stats':
> >
> >     filter, lag
> >
> > The following objects are masked from 'package:base':
> >
> >     intersect, setdiff, setequal, union
> >
> >> summarise
> > function (.data, ...)
> > UseMethod("summarise")
> > <environment: namespace:dplyr>
> >>
> > =======================
> > ***However, if I then install plyr I get what is below and masks the
> dplyr
> > summarise function:**
> >
> >> require(plyr)
> > Loading required package: plyr
> > Attaching package: 'plyr'
> > The following objects are masked from 'package:dplyr':
> >     arrange, desc, failwith, id, mutate, summarise
> >> summarise
> > function (.data, ...)
> > {
> >     stopifnot(is.data.frame(.data) || is.list(.data) ||
> > is.environment(.data))
> > ....
> > ...}
> > <environment: namespace:plyr>
> >>
> > ===============
> > ** Then no going back...
> > require(dplyr)
> >> summarise
> > function (.data, ...)
> > {
> >     stopifnot(is.data.frame(.data) || is.list(.data) ||
> > is.environment(.data))
> > ....
> > ...}
> > <environment: namespace:plyr>
> >>
> >
> >         [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > 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.
>

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