[R] Data extraction problem after importation using RODBC

[Dieter Menne]

Axel Leroix wrote:
> 
> 
> Then I perform an lm regression using the following code:
> reg1 <-lm(data$prod~data$pri+data$cli) 
> summary(reg1)
> 

Use 

reg1 <-lm(prod~pri+cli, data=data) 

instead. It is not necessary to call the data frame you read your stuff into
"data", any more useful name, such as "ecg" or "delivery" will do.
 
Then I try to perform a gls regression because I have a correlation problem.
For this I use the following code:
reg1gls <- gls(data$prod ~ data$pri + data$cli + 
correlation=corAR1(form= ~data$Year), method='ML')
 
The problem is that after this gls regression, I have the fellowing error
message :
 
Error in eval(expr, envir, enclos) :  'Year' object is not find 
 


If you have problems, print

str(data) << or whatever you want to call this

Use the same form as above; check the documentation example. This has
nothing to do with ODBC import, because your first example worked (I
presume).

Dieter

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