[R-sig-teaching] Problem with "attach"

[Steven Stoline]

Dear Rich:

Thank you very much. it works

Steve


On Sun, Dec 28, 2014 at 7:10 PM, Richard M. Heiberger <rmh at temple.edu>
wrote:

> Steven,
>
> It is strongly recommended that you don't use attach.
> Use the data= argument.  This works.
>
> my.data <- data.frame(contributions=c(
>                         1000,1500,1200,1800,1600,1100,1000,1250,
>                         1500,1800,2000,1200,2000,1700,1800,1900,
>                         0900,1000,1200,1500,1200,1550,1000,1100),
>                       approach=factor(c(
>                         1,1,1,1,1,1,1,1,
>                         2,2,2,2,2,2,2,2,
>                         3,3,3,3,3,3,3,3)))
>
> bwplot(contributions ~ approach, data=my.data) ## lattice graphics
>
> plot(contributions ~ approach, data=my.data)   ## base graphics
>
> Rich
>
> On Sun, Dec 28, 2014 at 6:35 PM, Steven Stoline <sstoline at gmail.com>
> wrote:
> > Dear All:
> >
> > I do have problem with attach. I believe that I am doing the data.frame
> > correctly. But it seems that I do have problem with the "attach"
> statement.
> >
> > here is what I am doing:
> >
> >
> >
> contributions<-c(1000,1500,1200,1800,1600,1100,1000,1250,1500,1800,2000,1200,2000,1700,1800,1900,900,1000,1200,1500,1200,1550,1000,1100)
> > contributions
> >
> > ### approach<-c(rep(1,8), rep(2,8), rep(3,8))
> >
> > approach<-c(1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3)
> > approach
> >
> > n<-length(contributions)
> >
> > donations <- data.frame(approach=approach,contributions=contributions)
> > donations
> >
> >
> > attach(donations)
> >
> >
> >
> > the code "*plot(approach~contributions)* " should yield the box-plots,
> but
> > it does not.
> >
> >
> >
> >
> >
> > This what I got from R:
> > ================
> >
> >> attach(donations)
> > The following objects are masked _by_ .GlobalEnv:
> >
> >     approach, contributions
> > The following objects are masked from donations (position 3):
> >
> >     approach, contributions
> > The following objects are masked from donations (position 5):
> >
> >     approach, contributions
> > The following objects are masked from donations (position 6):
> >
> >     approach, contributions
> > The following objects are masked from donations (position 8):
> >
> >     approach, contributions
> > The following objects are masked from donations (position 10):
> >
> >     approach, contributions
> > The following objects are masked from donations (position 12):
> >
> >     approach, contributions
> > The following objects are masked from donations (position 13):
> >
> >     approach, contributions
> > The following objects are masked from donations (position 14):
> >
> >     approach, contributions
> > The following objects are masked from donations (position 15):
> >
> >     approach, contributions
> > The following objects are masked from donations (position 16):
> >
> >     approach, contributions
> >
> >
> >
> > Any help will be highly appreciated.
> > with many thanks
> > Steve
> >
> >
> >
> > --
> > Steven M. Stoline
> > 1123 Forest Avenue
> > Portland, ME 04112
> > sstoline at gmail.com
> >
> >         [[alternative HTML version deleted]]
> >
> > _______________________________________________
> > R-sig-teaching at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-sig-teaching
>



-- 
Steven M. Stoline
1123 Forest Avenue
Portland, ME 04112
sstoline at gmail.com

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