command line assignment

Greetings,
   I am trying to use the nifty new command line feature of NCL from a
shell script (bash). I'd like to preassign an NCL variable before
calling a script. But I want to assign the NCL variable (basin) to the
value of a shell script variable (shbasin) which has already been
defined previously. If I try this interactively I get:

--------------------------------
[vigh_at_euler]$ shbasin="atlantic"
[vigh_at_euler]$ echo $shbasin
atlantic
[vigh_at_euler]$ ncl basin=$shbasin
 Copyright (C) 1995-2006 - All Rights Reserved
 University Corporation for Atmospheric Research
 NCAR Command Language Version 4.2.0.a034
 The use of this software is governed by a License Agreement.
 See http://www.ncl.ucar.edu/ for more details.
fatal: Assign: atlantic is undefined
fatal:Execute: Error occurred at or near line 1 in
file /tmp/ncl13631.ncl

ncl 0> quit
-------------------------------

Is there any way to do this? Do I need do some sort of fancy escape
sequence to make this work?

Thanks for any help,
Jonathan Vigh
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Received on Wed Nov 01 2006 - 17:38:18 MST