I agree with Daniel J. Nordlund that the problem must be that you are not
attaching the data to directly access x and y. Try to do that with
attach(data_model.df) right after reading the data.

Talita

2009/4/15 x <to_rent_2000@yahoo.com>

>
> I forgot to show that my file indeed contains x, y values:
>
> x       y
> 1       8.2
> 2       18
> 3       -17.6
> 4       -3.4
> 5       6.8
> 6       11.3
> 7       1.5
> 8       11
> 9       -3.3
> 10      8.1
>
>
> --- On Wed, 4/15/09, x <to_rent_2000@yahoo.com> wrote:
>
> > From: x <to_rent_2000@yahoo.com>
> > Subject: RE: [R] problem with read.table
> > To: r-help@r-project.org, "Nordlund, Dan (DSHS/RDA)" <
> NordlDJ@dshs.wa.gov>
> > Date: Wednesday, April 15, 2009, 5:09 PM
> > Thank you for the reply. That format works but since I need
> > access to x, y subsequent to lm() also, I tried the
> > following but now I'm back to the same old error message
> > of "object y not being found".
> >
> > data_model.df = read.table("./verify.txt",
> > header=TRUE, nrows=10);
> > dd = datadist(data_model.df);
> > options(datadist = 'dd');
> > describe(data_model.df);
> >
> > f <- lm(y ~ x)
> > print( summary(f) )
> >
> > plot(x, y)
> >
> > I tried without "options" and
> > "describe" and still the same problem.
> >
> > Thanks again!
> >
> >
> > --- On Wed, 4/15/09, Nordlund, Dan (DSHS/RDA)
> > <NordlDJ@dshs.wa.gov> wrote:
> >
> > > From: Nordlund, Dan (DSHS/RDA)
> > <NordlDJ@dshs.wa.gov>
> > > Subject: RE: [R] problem with read.table
> > > To: to_rent_2000@yahoo.com, r-help@r-project.org
> > > Date: Wednesday, April 15, 2009, 5:01 PM
> > > > -----Original Message-----
> > > > From: r-help-bounces@r-project.org
> > > [mailto:r-help-bounces@r-project.org] On
> > > > Behalf Of x
> > > > Sent: Wednesday, April 15, 2009 1:54 PM
> > > > To: r-help@r-project.org
> > > > Subject: [R] problem with read.table
> > > >
> > > >
> > > > Hi all,
> > > >
> > > > I've simple code to read a file (verify.txt
> > in the
> > > same directory as the script file) but
> > > > when I run this I get
> > > > "Error in eval(expr, envir, enclos) : object
> > > "y" not found".
> > > >
> > > > data_model.df =
> > read.table("./verify.txt",
> > > header=TRUE, nrows=10);
> > > > f <- lm(y ~ x)
> > > >
> > > > Could someone pls tell me what's wrong with
> > this
> > > code?
> > > >
> > > > Sincere thanks!
> > >
> > > I don't think there is a problem with
> > read.table().
> > > You need to attach the dataframe or specify
> > > data=data_model.df in the call to lm()
> > >
> > > f <- lm(y ~ x, data = data_model.df)
> > >
> > > Hope this is helpful,
> > >
> > > Dan
> > >
> > > Daniel J. Nordlund
> > > Washington State Department of Social and Health
> > Services
> > > Planning, Performance, and Accountability
> > > Research and Data Analysis Division
> > > Olympia, WA  98504-5204
>
> ______________________________________________
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> PLEASE do read the posting guide
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> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Talita Perciano
Instituto de Matemática e Estatísitca
Universidade de São Paulo - USP
PhD Student in Computer Science
São Paulo, SP, Brazil
Tel: +55 11 8826 7092

"Success is not final, failure is not fatal: it is the courage to continue
that counts."
(Winston Churchill)

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