[Met_help] [rt.rap.ucar.edu #61935] History for Getting minimum/maximum values out of MODE?

[Julie Prestopnik via RT]

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  Initial Request
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Hello,

I am wondering where/how to get the actual minimum or maximum values from objects? These values do not seem to be listed. Perhaps I am misinterpreting the output that exists...?

Regards
Marion

-- 
Dr Marion Mittermaier     Manager: Model diagnostics and novel verification 

Met Office   FitzRoy Road   Exeter   EX1 3PB   United Kingdom
Tel: +44 (0)1392 884830   Fax: +44 (0)1392 885681 
E-mail: marion.mittermaier at metoffice.gov.uk  http://www.metoffice.gov.uk 

http://www.metoffice.gov.uk/research/people/marion-mittermaier


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  Complete Ticket History
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Subject: Re: [rt.rap.ucar.edu #61935] Getting minimum/maximum values out of MODE?
From: Julie Prestopnik
Time: Fri Jun 21 11:17:41 2013

Hi Marion.  John is out of town, and I am helping out with met_help.
I
spoke with Randy who confirmed that the minimum and maximum values of
objects are not in the MODE output.

He indicated that the MODE NetCDF output contains the raw data values
(fcst_object_raw and obs_object_raw), so you could write a program to
read in these values from the NetCDF output and keep track of the
minimum and maximum.

If you don't want to write a program to do that, there is a way that
you
can get values close to the minimum and maximum.

He indicated that MODE outputs intensity percentiles (10th, 25th,
50th,
75th, and 90th percentiles), which may be more statistically robust.
MODE also allows for a user specifiable percentile, so you can set
your
own if the ones listed above do not meet your needs.

You could pick a low percentile, say 3rd or 5th, to give a
representative low value, close to the minimum value.  MODE only
allows
for one user specifiable percentile, but you could run MODE again to
obtain a representative high value.

Below I've pasted in a section from the MODEConfig_default file.
"inten_perc_value" is the field you want to modify to specify the
desired percentile (represented as an integer, e.g. for 3rd
percentile,
specify 3, not .03).

//
// Fuzzy engine weights
//
weight = {
    centroid_dist    = 2.0;
    boundary_dist    = 4.0;
    convex_hull_dist = 0.0;
    angle_diff       = 1.0;
    area_ratio       = 1.0;
    int_area_ratio   = 2.0;
    complexity_ratio = 0.0;
    inten_perc_ratio = 0.0;
    inten_perc_value = 50;
}

I hope this helps.

Julie

--
Julie Prestopnik
National Center for Atmospheric Research
Research Applications Laboratory
Phone: 303.497.8399
Email: jpresto at ucar.edu


On 06/21/2013 03:56 AM, marion.mittermaier at metoffice.gov.uk via RT
wrote:
>
> Fri Jun 21 03:56:46 2013: Request 61935 was acted upon.
> Transaction: Ticket created by marion.mittermaier at metoffice.gov.uk
>         Queue: met_help
>       Subject: Getting minimum/maximum values out of MODE?
>         Owner: Nobody
>    Requestors: marion.mittermaier at metoffice.gov.uk
>        Status: new
>   Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=61935 >
>
>
> Hello,
>
> I am wondering where/how to get the actual minimum or maximum values
from objects? These values do not seem to be listed. Perhaps I am
misinterpreting the output that exists...?
>
> Regards
> Marion
>



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