R help - Feb 2008 - R is not reading(?) my data properly

Thanks for the replies to my prior question.  My problem is that R always
says object not found when I enter a variable name into a command.  I
converted a Stata file into an Rdata file by first loading the foreign
package by entering

require(foreign)

Then I asked R to read the Stata file by entering

pol572a1<- read.dta("C:\\alex\\Graduate Coursework\\Pol
572\\pol572a1.dta")

So now I can do a few things with the data, but I am only able to do so by
entering

with(pol572a1,

before typing another command. So I enter the following for a scatter plot:
with(pol572a1, plot(rgnpc, incmean))

When I run a simple linear regression, I enter the following: with(pol572a1,
lm(incmean~rgnpc))

But when try to get a fitted line, I enter the following: with(pol572a1, lm(
share.gnp)<-lm(incmean~rgnpc))  But I get the following error message: Error
in lm(share.gnp) <- lm(incmean ~ rgnpc) : object "share.gnp" not
found

So what should I do to get R to read the dataframe in the ordinary way with
the usual command?  I am willing to scrap this dataframe and use the
original Stata file to start over, as long as that resolves the problem.

Thanks!

Alex

	[[alternative HTML version deleted]]

Alexander,

Learn to use the data argument. E.g. 

plot(rgnpc, incmean, data = pol572a1)
Model <- lm(incmean ~ rgnpc, data = pol572a1)

to get the fitted values:

Model$fitted

HTH,

Thierry

PS It seems to me that you might want to read a good introduction into
R.

------------------------------------------------------------------------
----
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature
and Forest
Cel biometrie, methodologie en kwaliteitszorg / Section biometrics,
methodology and quality assurance
Gaverstraat 4
9500 Geraardsbergen
Belgium 
tel. + 32 54/436 185
Thierry.Onkelinx op inbo.be 
www.inbo.be 

Do not put your faith in what statistics say until you have carefully
considered what they do not say.  ~William W. Watt
A statistical analysis, properly conducted, is a delicate dissection of
uncertainties, a surgery of suppositions. ~M.J.Moroney

-----Oorspronkelijk bericht-----
Van: r-help-bounces op r-project.org [mailto:r-help-bounces op r-project.org]
Namens Alexander Ovodenko
Verzonden: zaterdag 9 februari 2008 17:23
Aan: r-help op r-project.org
Onderwerp: [R] R is not reading(?) my data properly

 Thanks for the replies to my prior question.  My problem is that R
always
says object not found when I enter a variable name into a command.  I
converted a Stata file into an Rdata file by first loading the foreign
package by entering

require(foreign)

Then I asked R to read the Stata file by entering

pol572a1<- read.dta("C:\\alex\\Graduate Coursework\\Pol
572\\pol572a1.dta")

So now I can do a few things with the data, but I am only able to do so
by
entering

with(pol572a1,

before typing another command. So I enter the following for a scatter
plot:
with(pol572a1, plot(rgnpc, incmean))

When I run a simple linear regression, I enter the following:
with(pol572a1,
lm(incmean~rgnpc))

But when try to get a fitted line, I enter the following: with(pol572a1,
lm(
share.gnp)<-lm(incmean~rgnpc))  But I get the following error message:
Error
in lm(share.gnp) <- lm(incmean ~ rgnpc) : object "share.gnp" not
found

So what should I do to get R to read the dataframe in the ordinary way
with
the usual command?  I am willing to scrap this dataframe and use the
original Stata file to start over, as long as that resolves the problem.

Thanks!

Alex

	[[alternative HTML version deleted]]

______________________________________________
R-help op 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.