Obviously, when you call the function "trellis.device(postscript, ......)" 
you have set current output device to postscript, look at the file *.ps !
Try the same call with "windows" at the place of "postscript"!
Best!

A.S.

----------------------------

Alessandro Semeria 
Models and Simulations Laboratory
Montecatini Environmental Research Center (Edison Group), 
Via Ciro Menotti 48,
48023 Marina di Ravenna (RA), Italy
Tel. +39 544 536811
Fax. +39 544 538663
E-mail: alessandro.semeria@cramont.it

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