devList: Lists the indices of the open devices named by their labels
Description
Lists the indices of the open devices named by their labels.
Usage
devList(interactiveOnly=FALSE, dropNull=TRUE, ...)
Arguments
  
- interactiveOnly
 
If TRUE, only open interactive/screen devices
    are returned.
  
- dropNull
 
If TRUE, the "null" device (device index 1) is
    not returned.
  
- ...
 
Not used.