Problem with "attach"

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

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