Re: get_res_value

On Wed, 29 Jul 2009, Xuguang Wang wrote:

> Hi,
>
> I am using wrf_user_ll_to_ij where the 4th argument is opts_args:logical,
> which will be fed into the first argument of get_res_value. Please see
> below for how they are related. Could anyone tell me how to set the first
> argument of get_res_value?
>

Xuguang,

"get_res_value" is an internal routine that is not meant
in general for users.

What it does is looks at logical variable to see if it is True *and*
if the given attribute is attached to it. If it is, then it returns
that attribute's value. If not, then what's returned is the third
argument of "get_res_value".

So:

   useT = get_res_value(opts,"useTime",0)

is the equivalent of:

   if(opts.and.isatt(opts,"useTime")) then
     useT = opts_at_useTime
   else
     useT = 0
   end if

--Mary

> Thanks.
> Xuguang
>
> function wrf_user_ll_to_ij( nc_file:file, longitude:numeric,
> latitude:numeric, \
> opts_args:logical )
>
> begin
>
> opts = opts_args
> useT = get_res_value(opts,"useTime",0)
> returnI= get_res_value(opts,"returnInt",True)
>
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Received on Wed Jul 29 2009 - 12:13:41 MDT