RExpression
org.ecoinformatics.seek.R.RExpression

The RExpression actor is an actor designed to run an R script or function with inputs and outputs determined by the ports created by the user. Port names will correspond to R object names. The RExpression actor is modeled after the Ptolemy expression actor, except that that instead of using a single mathematical expression in Ptolemy's expression language, it uses a set of the more powerful, higher order expressions available under R. Both input and output port will usually be added to the actor; The names of these ports correspond to R variables used in the R script.

Author(s): Dan Higgins, NCEAS, UC Santa Barbara
Version:3/3/2006


output
The output port.

graphicsFileName
The name of the default graphics output file created by the actor



save_nosave
This setting determines whether or not to save the R workspace when R is closed; set to '--save' if you need to retreive the workspace later in a workflow in another RExpression actor.

Rcwd
The 'R' working directory (home dir by default)

graphicsOutput
If true, then create a graphics output port. (the default); If false, then don't.

numXPixels
The width of the output graphics bitmap in pixels

numYPixels
The height of the output graphics bitmap in pixels