R help - Oct 2008 - Fehler in x$terms : $ operator is invalid for atomic vectors

Dear All

I try to use your R package MCMCpack and I have encountered the following
problem:

 

The following code works fine:

 

library(MCMCpack)

line <- list(X = c(-2,-1,0,1,2), Y = c(1,3,3,3,5))

posterior1 <- MCMCregress(X~Y, data=line)  

summary(posterior1)  

 

But as long as I try the following lines

 

library(MCMCpack)

line <- list(X = c(-2,-1,0,1,2), Y = c(1,3,3,3,5))

posterior2 <- MCMCregress(paste(?X?,?Y?,sep=?~?), data = line)  

summary(posterior2)  

 

I get the following error message:

 
>   library(MCMCpack)
> line <- list(X = c(-2,-1,0,1,2), Y = c(1,3,3,3,5))
> posterior2 <-
MCMCregress(paste("X","Y",sep="~"), data = line)
Fehler in x$terms : $ operator is invalid for atomic vectors
> summary(posterior2)
Fehler in summary(posterior2) : objekt "posterior" nicht gefunden
> 
  

 

This is seems to me a bit strange as the following line with the command lm(),
which I believe use a similar structure, works fine:

 

  X = c(-2,-1,0,1,2)

  Y = c(1,3,3,3,5)

  lm(paste("X","Y", sep="~"))

  lm(X~Y)

 

Thank you

Borissssssssssssssssssssss


--

<Boriss <at> gmx.net> writes:
> 
> Dear All
> 
> I try to use your R package MCMCpack and I have 
> encountered the following problem:
> 
    You should (a) address this to the maintainers of the
MCMCpack package (see help(package="MCMCpack") for contact
info) and (b) indicate the results of sessionInfo(), which
will give information on what version of R, MCMCpack, operating
system, etc. you use.

  good luck,
   Ben Bolker