Re: [idvusers] time selection and area averages

• To: Suvarchal Kumar <suvarchal.kumar@xxxxxxxxxxxxxxx>
• Subject: Re: [idvusers] time selection and area averages
• From: Yuan Ho <yuanho@xxxxxxxx>
• Date: Wed, 27 May 2015 08:08:56 +0800

Hi Suvarchal,
           We have a few area average formulas available, such as
rects(field, D=2) for the rectangular aperature smoothing,  and you can
check out the Jython libraries under Grid Diagnostics. There is also a
formula named getNthTimeGrid(field, Nth) for your second request under the
Grid Routines.


Yuan

On Mon, May 25, 2015 at 3:24 PM, Suvarchal Kumar <
suvarchal.kumar@xxxxxxxxxxxxxxx> wrote:

> Hi All, I am trying to write some jython scripts to make a composite views,
>
> two things i cant figure out in my script:
> 1) I want  to compute and display average of a grid at every time step.
>
> I feel there must be better way to do then loop around this to get an
> Average
> ucar.unidata.util.Misc.getAverage(avgvariable.getSample(i).getFloats()[0])
> --well i can live with it.
>
> I am ok with an average but would like area average, i havent seen a
> direct function(?), is there a way to get area of each grid box? that i
> could multiply and average myself? I think i saw it somewhere  but cant
> find where.
>
> 2) how to access a grid at particular time subset passed as an array?
>   i have a gridded dataset with N times as timeset, would like to have
> newvariables at time indices 1,2,7 or specified by time values, into a new
> variable.
>
> so I would like to get  only a particular time subset of a grid specified
> by a time array list(either index or value). This works as part of
> Dataselection before reading dataset but cant manage it with a variable
> after it is loaded?
>
> Cheers,
> Suvarchal
>
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