Problem understanding set X and Y

[Jennifer Adams]

Once those grid coordinates are converted to world coordinates, check
the output from 'q dims' and you'll see fractional values for grid
dimensions in lat and lon. The fwrite code rounds these outwards, to
make sure that the data written out to file completely covers the
desired area. To overcome this problem, use the command 'set
fwex' (for 'set fwrite exact') right before  your 'set x' and 'set y'
commands, and GrADS will save the grid coordinates you specify and
will not convert them to world coordinates before invoking fwrite.
Jennifer

On Jun 9, 2008, at 5:00 PM, Shun Jie Liu wrote:

> Hi GrADs users, there is something I do not understand.
> When using set x val <val2> , from reading the documentation, its
> always converted to world coordinates if grid points are used.
> when I tried these command
> set x 10 11
> set y 10 11
> I end up with 6 outputs in my .dat file using fwrite
> Can anyone explain this for me ?
>
> Thank you very much
>
> - Shunjie
>

--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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