[R] irregual space plot

[Uwe Ligges]

Jason Fisher wrote:
> 
> Hello everyone...
> 
> I was hoping an R wizard could help me out with this one.  My current R
> programming endeavors require that I generate plots of groundwater state
> variables (e.g. pressure fields, contaminate plumes, etc.) in a 2-D slice of
> a 3-D system.  While the functions contour() and filled.contour() are close
> to what I’m looking for, they unfortunately lack in their inability to deal
> with irregular boundaries (non-rectangular systems).  The irregular systems
> I’m working with are made up of finite elements (each 2-D element
> constructed from 3 or 4 nodes) where linear basis functions describe every
> point (x,y) in the element.  I believe I could deal with my plotting dilemma
> if I had a function very similar to “.Internal(filledcontour())”.  A
> function, which would allow me to specify contours or colors between
> contours within an element.  If someone could give me a hand on this project
> or point me towards helpful resources, it would be greatly appreciated.
> 
> Regards,
> 
> Jason
> 
> PS:  If any additional information is needed, please ask.

What about setting non-existing points of your system to NA (will result
in "white space") in that matrix you use for filled.contour()?

Uwe