testAlpha

 numeric vector of alpha transparency values values from 0 to 1. 

alpha

 foreground colour of the top shape that varies in transparency. 

 background colour (remains constant) of the underlying shape. 

 border colour (which also changes in transparency) of the foreground polygon. 

border

 logical: if <code>TRUE</code>, lay a grey grid on the background colour. 

grid

 additional graphical arguments to send to the the ploting functions. 


  Display how the alpha transparency for <code>rgb()</code> varies. 


 color 

Provides software to facilitate the design, testing, and operation
of computer models. It focuses particularly on tools that make it easy to
construct and edit a customized graphical user interface (GUI). Although our
simplified GUI language depends heavily on the R interface to the Tcl/Tk
package, a user does not need to know Tcl/Tk. Examples illustrate models
built with other R packages, including PBSmapping, PBSddesolve, and BRugs.
A complete user's guide `PBSmodelling-UG.pdf' shows how to use this package
effectively.

testAlpha: Test Various Alpha Transparency Values

Description

Usage

Arguments

Value

See Also