Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
Drexel University or The Math Forum.


Frank
Posts:
115
Registered:
12/27/07


Re: ranked histogram plot for ensemble member
Posted:
Jul 1, 2012 3:28 PM


"Bruno Luong" <b.luong@fogale.findmycountry> wrote in message <jsose0$c6f$1@newscl01ah.mathworks.com>... > "Pg " <poulomizca@gmail.com> wrote in message <jsoq8r$5hd$1@newscl01ah.mathworks.com>... > > No it is some times called Talagrand diagrams, i.e., mentioned in Hamill (2001) paper: "Interpretation of ranked histogram for verifying ensemble forecasts" > > What is the formal definition of it? What's difference with a standard histogram? > > Bruno

It seems to be a standard histogram, and would work with MATLAB's histogram functions. I have no idea if an existing MEX routine exists for it. I'll defer to Bruno for a definitive opinion.
The paper Pg is referring to is available here for free (as is the PDF): http://journals.ametsoc.org/doi/full/10.1175/15200493%282001%29129%3C0550%3AIORHFV%3E2.0.CO%3B2. A concise description of the calculation of the Talagrand diagram is on slides 910 here: http://collaboration.cmc.ec.gc.ca/cmc/cmoi/product_guide/docs/lib/ens_en.pdf.
I had honestly never heard of this, since my knowledge of meteorology is limited to what I learned to get my Instrument Rating a while ago. The Talagrand diagram seems to be a way of verifying an ensemble of different models (or different model results) w.r.t. observations when such as the MSE would not be appropriate or applicable.
So thank you, Pg, I learned something.



