, with the contents of four lines changed to
x1= 60 ; Leftmost grid point to depict, for dimension x or lon x2= 80 ; Rightmost grid point to depict y1= 85 ; Lowermost grid point to depict, for dimension y or lat y2= 105 ; Uppermost grid point to depict
in order to zoom in on a sub-domain.
Then, a figure was made by issuing the command
contour.sh 4dmap hycom_031_TS.nc salin 6 1
The figure above does not contain a lot of information. This shows that NCL's automatic contouring capability can fall short of the user's requirements. Such a circumstance typically arise when the field to be displayed contains outliers. In this example, salty waters exist south of the tip of Florida. Thus:
The figure below was made by issuing the same command as in Example 3, after the file userdef.ncl was copied from