R help - Feb 2012 - Cannot use setClass() in Rscript

Greetings,

I am creating a standalone executable script using Rscript and have run
into problems when I define a new S4 class. Here is a small script that
demonstrates my problem:

#!/usr/bin/env Rscript
#
# toy.Rscript -- testing S4 class creation in an Rscript

setClass("toy",
  representation(name = "character",
                 price = "numeric"),
  prototype(name = "ball",
            price = 10.0)
)

b <- new("toy")
print(b)

When I make this script executable and run it I get the following error:

$ ./toy.Rscript
Error: could not find function "setClass"
Execution halted

Here is the relevant version information:

$ Rscript --version
R scripting front-end version 2.14.0 (2011-10-31)

I am in the process of developing a set of S4 classes that I will
eventually put into a package. I have been developing interactive scripts
that can source the S4 class files without any problem. But now that I want
to build a small command line 'wrapper' around my code I find that
Rscript
is not aware of "setClass".

Any suggestions?

Jon

-- 
Jonathan Callahan, PhD
Mazama Science
206-708-5028
mazamascience.com

	[[alternative HTML version deleted]]

On 02/15/2012 12:33 PM, Jonathan Callahan wrote:
> Greetings,
>
> I am creating a standalone executable script using Rscript and have run
> into problems when I define a new S4 class. Here is a small script that
> demonstrates my problem:
Hi --

Check out the difference between

   R --vanilla -e "sessionInfo()"

and

   Rscript --vanilla -e "sessionInfo()"

Rscript does not load the 'methods' package, so add require(methods) to 
your script.

Martin
>
> #!/usr/bin/env Rscript
> #
> # toy.Rscript -- testing S4 class creation in an Rscript
>
> setClass("toy",
>    representation(name = "character",
>                   price = "numeric"),
>    prototype(name = "ball",
>              price = 10.0)
> )
>
> b<- new("toy")
> print(b)
>
> When I make this script executable and run it I get the following error:
>
> $ ./toy.Rscript
> Error: could not find function "setClass"
> Execution halted
>
> Here is the relevant version information:
>
> $ Rscript --version
> R scripting front-end version 2.14.0 (2011-10-31)
>
> I am in the process of developing a set of S4 classes that I will
> eventually put into a package. I have been developing interactive scripts
> that can source the S4 class files without any problem. But now that I want
> to build a small command line 'wrapper' around my code I find that
Rscript
> is not aware of "setClass".
>
> Any suggestions?
>
> Jon
>

-- 
Computational Biology
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N. PO Box 19024 Seattle, WA 98109

Location: M1-B861
Telephone: 206 667-2793