Remapping variables onto new axes

[David Oxilia <oxilia@xxxxxxxxxxxx>]

I have a netCDF file which contains oceanographic data. The result of a
'show data' in Ferret is:

 name     title                             I         J         K         L
 UP       Baroclinic zonal velocity        1:275     1:307     1:10      1:9
 VP       Baroclinic meridional velocity   1:275     1:307     1:10      1:9
 DP       Layer thickness                  1:275     1:307     1:10      1:9
 UB       Barotropic zonal velocity        1:275     1:307     1:10      1:9
 VB       Barotropic meridional velocity   1:275     1:307     1:10      1:9
 ETA      Bottom pressure variation        1:275     1:307     1:10      1:9
 US       Zonal forcing of barotropic      1:275     1:307     1:10      1:9
 VS       Meridional forcing of barotropi  1:275     1:307     1:10      1:9
 Q        Barotropic Montgomery function   1:275     1:307     1:10      1:9
 
Here, DP are increments in pressure at each ocean layer k=1:10. The axes
which result from plotting vertical sections are either latitude(theta) vs 
Z(layer) or longitude(phi) vs Z(layer).

In order to plot a section of incremental pressure (as a function of Z) I 
created a variable, P, as follows:

repeat/k=1:9 let P = (1+eta)*dp[k=@rsum]

A couple of questions:

- Is it possible to create variables like P omitting the 'repeat' statement
  making more effective use of the @ notation?

- Is there a way to invert P(Z) to obtain Z(P)?

- How can I plot sections of UP or VP as function of P rather than Z?
  This would provide sections of dynamic variables as a function of
  'depth' rather than the non-dynamic Z.

Many thanks,

David.

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David Oxilia                          Tel: (541) 737-2368
COAS-Oregon State University          Fax: (541) 737-2064
Ocean Admin. Bldg. 104                
Corvallis, OR 97331-5503              Email: oxilia@hejira.oce.orst.edu
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