problem with read.table

From: Talita Perciano <talitaperciano at gmail.com>
Subject: Re: [R] problem with read.table
To: to_rent_2000 at yahoo.com
Cc: r-help at r-project.org
Date: Wednesday, April 15, 2009, 6:04 PM
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 at 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 at yahoo.com>

wrote:

From: x <to_rent_2000 at yahoo.com>
Subject: RE: [R] problem with read.table
To: r-help at r-project.org, "Nordlund, Dan

(DSHS/RDA)" <

NordlDJ at 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 at dshs.wa.gov> wrote:

From: Nordlund, Dan (DSHS/RDA)

<NordlDJ at dshs.wa.gov>

Subject: RE: [R] problem with read.table
To: to_rent_2000 at yahoo.com,

r-help at r-project.org

Date: Wednesday, April 15, 2009, 5:01 PM

-----Original Message-----
From: r-help-bounces at r-project.org

[mailto:r-help-bounces at r-project.org] On

Behalf Of x
Sent: Wednesday, April 15, 2009 1:54 PM
To: r-help at 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

reproducible code.

-- 
Talita Perciano
Instituto de Matem?tica e Estat?sitca
Universidade de S?o Paulo - USP
PhD Student in Computer Science
S?o 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)