[GEMPAK #DHU-135597]: Help - Gempak :)

Hi Ana,

You can express the addition with multiple ADD calls:

ADD(ADD(P06M^00,P06M^06),ADD(P06M^12,P06M^18))

-Michael



> Thanks for help.
> 
> I use the GFUNC=ADD() but this function only accept two values. How i
> add more values, for example. ADD(P06M^00;P06M^06;P06M^12;P06M^18)
> Sum the P06m for all hours.
> 
> Thanks :)
> 
> Ana
> 
> 
> Unidata GEMPAK Support escreveu:
> > Ana,
> >
> > If you have both grids in the same file, you can compute the average using 
> > GDDIAG, where "GEM_FILE" is the name of the file containing both grids:
> >
> >  GDFILE   = GEM_FILE
> >  GDOUTF   = GEM_FILE
> >  GFUNC    = avg(P06M^f06,P06M^f18)
> >  GDATTIM  = 100409/1200
> >  GLEVEL   = 0
> >  GVCORD   = none
> >  GRDNAM   = PAVG^f012
> >  GRDTYP   = S
> >  GPACK    =
> >  GRDHDR   =
> >  PROJ     =
> >  GRDAREA  =
> >  KXKY     =
> >  MAXGRD   = 200
> >  CPYFIL   = GEM_FILE
> >  ANLYSS   =
> >
> > In this example we're using P06M forecasts for f06 and f18 from 
> > 100409/1200, you'll want to adjust these to suit your file/grids date and 
> > time.  also the GRDNAM = PAVG can be anything you prefer.  See
> >
> > http://www.unidata.ucar.edu/cgi-bin/gempak/manual/programs_index?gddiag
> >
> > and
> >
> > http://www.unidata.ucar.edu/cgi-bin/gempak/manual/variables_index?grdnam
> >
> > for more help.
> >
> > Michael James
> > Unidata
> >
> >
> >
> >> Hello Tom, How are you?
> >>
> >> I don't know if you can help me..but...
> >>
> >> I'm trying to do the interpolation the P06M for 2 hours the synop data
> >> for plot with gdcntr.
> >>
> >> I'm using the oagrid for create and oabsfc for input surface file. But i
> >> don't know How i plus P06M for hours (06 and 18) and generate 
> >> interpolation.
> >>
> >> With gempak  is possible plus the values for two hours and after create
> >> the grid file??
> >>
> >> Thanks
> >> Ana
> >>
> >>
> >> p.s.: sorry if my English is not very good.
> >>
> >> I will send for you the gif with one hour P06M  that i create.
> >>
> >>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: DHU-135597
> > Department: Support GEMPAK
> > Priority: Normal
> > Status: Open
> >
> >
> 
> 


Ticket Details
===================
Ticket ID: DHU-135597
Department: Support GEMPAK
Priority: Normal
Status: Open