> I use the function "gradsf" to calculate gradient.
> if my data has missing value or not global grid does any function can do it ?
>
No. This uses spherical harmonics. As indicated in the documentation,
missing data are not allowed and the data must be global.
You can use "center_finite_dif" if you have a regualr grid.
The grid points need not be equally spaced.
http://www.ncl.ucar.edu/Document/Functions/Built-in/center_finite_diff.shtml
Example 6 shows how to compute dT/dx ; u can use the same process for
latitude dT/dy.
goo luck
_______________________________________________
ncl-talk mailing list
ncl-talk@ucar.edu
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
This archive was generated by hypermail 2b29 : Thu Aug 04 2005 - 08:56:41 MDT