[gradsusr] Help in showing the example of using maxloc()

[Kristen Briggs]

If you have a pressure variable, you might be able to use the maskout function in combination with a nested max (not maxloc) statement as suggested in Jeffrey Duda's email, for example:
"define maxwind=max(max(max(wind,lev=700,lev=1000),lon=0,lon=180),lat=0,lat=90)"   <this should give you a single value>
"set gxout stat"
"d maskout(pressure,wind-maxwind)"
In theory this would make all wind values negative except the maximum value and thus all pressure values would be masked out except for the one associated with the maximum wind value.  The gxout stat output might then give you that associated pressure value?
Kristen Briggs

----- Original Message -----
From: Jeffrey Duda <jdduda at iastate.edu>
Date: Thursday, March 18, 2010 11:05 am
Subject: Re: [gradsusr] Help in showing the example of using maxloc()
To: GrADS Users Forum <gradsusr at gradsusr.org>

> Don't use maxloc(), use max().  Something like "d
> max(wind,lev=700,lev=1000)" should work I think.  You might have to 
> nest a
> few "max" statements inside each other for the areal coverage (X 
> and Y
> directions).  I think the examples of the "max" function show this 
> prettywell: http://www.iges.org/grads/gadoc/gadocindex.html
> 
> Jeff Duda
> 
> On Thu, Mar 18, 2010 at 12:37 AM, sushant puranik
> <sushantpuranik at gmail.com>wrote:
> 
> > hi
> > I also made an attempt to find the maximum wind between 1000hPa 
> to 700hPa
> > level with the help of maxloc command.
> > I am able to plot the maximum value of each grid. But in it i 
> also need to
> > plot the level at which the maximum value belongs, but till date 
> i am not
> > able to solve this problem.
> >
> > Do you have any suggestions.
> >
> > Thank you in advance
> >
> > On Tue, Mar 16, 2010 at 3:46 AM, See Hai Ooi <axl419 at yahoo.com> 
> wrote:>
> >> Dr Charles Seman,
> >>
> >>      Yes, the script is what I need.  Thank you very much.
> >>
> >> Ooi
> >>
> >>
> >>      New Email names for you!
> >> Get the Email name you've always wanted on the new @ymail and 
> @rocketmail.>> Hurry before someone else does!
> >> http://mail.promotions.yahoo.com/newdomains/aa/
> >>
> >> _______________________________________________
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> >> gradsusr at gradsusr.org
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> >>
> >
> >
> >
> > --
> > Sushant Puranik
> > Junior Research Fellow
> > Dept. of Atmospheric & Space Sciences,
> > University of Pune,
> > Pune-07,
> > India.
> >
> > _______________________________________________
> > gradsusr mailing list
> > gradsusr at gradsusr.org
> > http://gradsusr.org/mailman/listinfo/gradsusr
> >
> >
> 
> 
> -- 
> Jeff Duda
> Iowa State University
> Meteorology Graduate Student
> 3134 Agronomy Hall
> www.meteor.iastate.edu/~jdduda
>