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20020215: Avg. Several Forecast hours at one time.

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  • Subject: 20020215: Avg. Several Forecast hours at one time.
  • Date: Fri, 15 Feb 2002 13:06:09 -0700
Andy,

try using the UltraSeek (aka Inktomi) search link rather than glimpse.

Use GDSTAT to compute avg, std deviation of a time series of grids.

Steve Chiswell
Unidata User Support

>From: "Siffert, Andy" <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200202151810.g1FIAGx09139

>
>
>
>Hello,
>First off, I would just like make a small suggestion, I wish I could search
>the Gempak Support e-mail archive easier.
>Seem like everything I search for it comes up  with 0 matches found.
>Unless you have a basic one word item, you want to search for.  However,
>then you have a several e-mail that you have to browse through which takes
>lots of time.
>So, again take this with a grain of salt, next time unidata builds a search
>engines to look through e-mail support archives, I would build it much like 
>http://list.cineca.it/archives/gradsusr.html 
>
>However, thanks for all your support in the mean time.
>
>
>Anyway, know to my question, 
>I want to do a fairly simple task.  I think.  I'm trying to compute the Avg
>Tmpk at 850 mb of the MRF model.
>The forecast hours I would like to avg start on F144 and avg. thru F228.
>I'm just not sure what the syntax would be in GEMPAK to do this since it
>involves avg. over several times.
>I know how to avg from two differnt forecast hours.
>But not a group for forecast hours.   I'm sure there is several differnt way
>of doing this.  
>Below is what I have to avg from F144-156,
>If I were to do 
>GDATTIM  = 020215/0000F144-020215/0000F228
>GFUNC    = avg(tmpk^020215/0000F144,tmpk^020215/0000F156)
>I understand that it overrides the gdattim.
>
>I wish I could 
> avg(tmpk^020215/0000F144,tmpk^020215/0000F228)
>but this just avg the F144 and F228
>I want to avg all the forecast hours in-between F144 F228  (F156 F168 F180
>F192 F204 F216) 
>Also, when I avg what I have below and  create a new gemfile it labels the
>avg at two time. 
>
>NUM       TIME1              TIME2           LEVL1 LEVL2  VCORD PARM
>  2     020215/0000F144   020215/0000F156      850         PRES AVG
>
>
>
>#This just avg. between two forecasts.F144-156
> 
>
>GEMPAK-GDPLOT>l
> GDFILE   = 2002021500_mrf201.gem
> GDATTIM  = 020215/0000F144-020215/0000F156
> GLEVEL   = 850
> GVCORD   = pres
> PANEL    = 0
> SKIP     = 0
> SCALE    = 999
> GFUNC    = avg(tmpk^020215/0000F144,tmpk^020215/0000F156)
> CTYPE    = C
> CONTUR   = 0
> CINT     = 0
> LINE     = 3
> FINT     = 0
> FLINE    =  
> HILO     =  
> HLSYM    =  
> CLRBAR   =  
> GVECT    =  
> WIND     =  
> REFVEC   =  
> TITLE    =  
> TEXT     = 1
> CLEAR    = yes
> GAREA    = us
> PROJ     = str/90;-100;-3
> MAP      = 23
> LATLON   = 0
> DEVICE   = XW
> STNPLT   =  
> GEMPAK-GDPLOT>
>
>If you are not sure what I'm asking just say so, and I'll try to clear up
>what I'm trying to say.
>Thanks alot,
>Andy 
>