setClass not found when running R script from command line

Question

I have simple R script which trying to Define class. example.R

 Tuple <- setClass("Tuple",
            slots = c(
              id="character",
              comp="character",
              stream="character",
              task="character",
              output="vector",
              anchors="vector"
                )
            );

when i run Rscript example.R . i am getting an error saying below

Error in eval(expr, envir, enclos) : could not find function "setClass" Calls: source -> withVisible -> eval -> eval

can any one help?

Dirk is no longer here · Accepted Answer · 2019-01-16 14:30:53Z

17

Rscript, in all its wisdom, does not load the standard methods package. So precede your script with

library(methods)

and all should be good.

If you're on Linux, you could use our littler package. It loads methods for you too, and starts a little faster than Rscript too.

Edit It is now some five years later and this has been added to Rscript in R release 3.5.0 or later.

edited Jan 16, 2019 at 14:30

answered Dec 17, 2013 at 13:19

Dirk is no longer here

370k60 gold badges668 silver badges742 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

James Over a year ago

Or call with the namespace: methods::setClass(...

sebastian-c Over a year ago

As an additional note - if you have this problem when running checks on a package (if you're using devtools to run checks, for example) - you can add import(methods) to your NAMESPACE.

Collectives™ on Stack Overflow

setClass not found when running R script from command line

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related