And, finally (?), in reponse to the question: "how can I sum up the
grids I selected using the IDV's time selector?", the answer is:
1. change the formula to remove the second parameter
2. change the 'addEmUp()' method to something like this:
from visad.python.JPythonMethods import *
#
#This is the default editable users jython library
import visad
from visad.python.JPythonMethods import *
def addEmUp(g):
a = 0
num = getDomainSizes(g)
for k in range(num[0]):
a = g[k] + a
return
tom
On 3/6/07, Tom Whittaker <whittaker@xxxxxxxx> wrote:
I realized after I hit "Send" that in this case the "getNthTimeGrid()"
is not really needed. You can simply say: " a = g[k] + a ".
Perhaps the former is more illustrative as to what's going on,
however.
tom
On 3/6/07, Tom Whittaker <tomw@xxxxxxxxxxxxx> wrote:
> Hi Scott....
>
> The IDV formulas are ideal for this. If you're not familiar, let me
> suggest this.
>
> 1. Create a small Jython script in the "User Library"
> (Edit->Formulas->Jython LIbrary). If you're
> no familiar with Python syntax, just note that the number of
> spaces (indents) on a line
> are important since they determine the blocks in the code. Here's
> my suggestion:
>
> def addEmUp(g, n):
> a = 0
> for k in range(int(n)):
> a = getNthTimeGrid(g, k) + a
> return a
>
> Don't forget to "File->Save" the library.
>
> 2. Then create a formula to call this. For example:
> Name = Add times
> Formula = addEmUp(grid, user_NumbTimes)
>
> In the "Advanced" section, I would recommend enabling only the
> Displays relevant to your data (for example, Controur Plan View).
>
> Then use the Chooser to get pointed to your grids, and in the Field
> Selector, pick your formula. A small window will appear asking you
> for the value of "NumbTimes". Enter a number. Then you'll be asked
> to select from the usual list of grids -- pick the one your interested
> in.
>
> By the way, the "getNthTimeGrid()" is a method defined in the "System
> Jython library" -- lots of other goodies in there as well!
>
> Hope this gets you going!!
>
> tom
>
>
> On 3/6/07, Scott.Stephens <Scott.Stephens@xxxxxxxx> wrote:
> >
> > Hi,
> >
> > Has a sum function been built for IDV? I would like to generate precip
> > totals for varying time intervals, (e.g. total model QPF for a model's run
> > time, etc), but can't figure out the best way to generate the desired output
> > using multiple forecast hours.
> >
> > Thanks for your time,
> > Scott
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> --
> Tom Whittaker
> University of Wisconsin-Madison
> Space Science & Engineering Center (SSEC)
> Cooperative Institute for Meteorological Satellite Studies (CIMSS)
> 1225 W. Dayton Street
> Madison, WI 53706 USA
> ph: +1 608 262 2759
>
--
Tom Whittaker
University of Wisconsin-Madison
Space Science & Engineering Center (SSEC)
Cooperative Institute for Meteorological Satellite Studies (CIMSS)
1225 W. Dayton Street
Madison, WI 53706 USA
ph: +1 608 262 2759
--
Tom Whittaker
University of Wisconsin-Madison
Space Science & Engineering Center (SSEC)
Cooperative Institute for Meteorological Satellite Studies (CIMSS)
1225 W. Dayton Street
Madison, WI 53706 USA
ph: +1 608 262 2759
