converting abstract samplexy axis

[Joerg Franke <joerg.franke@xxxxxxxxxxxxxxxxxxxx>]

Hello,

I want to plot irregular spaced ship track measurements as a 
depth-profile from 90 to -90 degree latitude.
I load my data from a netcdf-file:
yes? use data.nc

I load the measurement location-coordinates from an ascii-file:
yes? file /var="xlon,ylat" coordinates.dat

Have a look on the shiptrack with:
yes? plot xlog,ylat

Use samplexy to create the profile:
LET slantc14 = samplexy(c14[d=1,l=40,y=90:-90],xlon[d=2],ylat[d=2])

Now the horizontal axis is abstract.

How do I convert it back to a real latitude axis???

Cheers
Joerg