Hi Yuan,
Probably i am asking too much,
I have seen getNthTimeGrid, same as doing field.getSample(Nthtime), Actually I
was wondering If i can subset a field(time|100,lat,lon) at select times , say
at indices 2,40,30,90 as a new field, so that i could plot it as one
variable/process it further. last resort for me would be declare a new field
and use a loop setSample to create the new variable. It would be great to have
some thing like pass array of time indices to a method to get all newtimes at
once.
i have tried rects(field.D=??) on a global field and with different smoothing
Integers and I dont seem to get a global area averaged value, any example on a
variable like field(time|100,lat|90,lon|180) would be helpful.
Thanks,
Suvarchal
________________________________
From: Yuan Ho [yuanho@xxxxxxxx]
Sent: Tuesday, May 26, 2015 8:08 PM
To: Suvarchal Kumar
Cc: idvusers@xxxxxxxxxxxxxxxx
Subject: Re: [idvusers] time selection and area averages
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<mailto: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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