[gradsusr] Averaging Multiple Data sets with Different Temporal Resolutions

[Jeff Duda]

Aaron,
Your blend would become "missing data" and you would get no plot at all
once even one of the input fields dropped out.

If you know the structure of the valid times of your data, and especially
if they don't change from one case to the next, your best bet would be to
use if statements to control the computation of blend.

Jeff Duda

On Fri, Jan 19, 2018 at 10:19 AM, Perry, Aaron <Aaron.Perry at lsc.vsc.edu>
wrote:

> I have a hypothetical question...
>
>
> If you were to blend multiple data sets together with varying temporal
> resolutions, (and after lterp'ing them all to the same grid) what would
> happen with one of the data sets if it's data time ran out before the
> others did?
>
>
> Ex.
>
>
> ND = No Data
>
>
> TAU 0 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120 126
> 132 138 144 150 156 162 168 174 180 186 192 198 204 210 216 222 228 234
> 240
> GFS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> - - - - - -
> CMC - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> - - - - - -
> ECM - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> - - - - - -
> NAM3 - - - - - - - - - - - ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND
> ND ND ND ND ND ND ND ND ND ND ND ND ND ND
> NAM12 - - - - - - - - - - - - - - - ND ND ND ND ND ND ND ND ND ND ND ND ND
> ND ND ND ND ND ND ND ND ND ND ND ND ND
>
>
> 'define blend = (GFS+CMC+ECM+NAM3+NAM12)/5.0'
>
>
> Would the sudden data drop-out in the average result in 0s being
> introduced into the average? How would you keep the data (last valid
> timestep) that runs out included in the overall average?
>
>
> Cheers,
>
>
>
> *Aaron D. Perry*
> Class of 2016
> Lyndon State College
> Lyndonville, VT 05851
> Twitter: @arnpry <https://twitter.com/arnpry>
> Email: Aaron.Perry at lyndonstate.edu
>
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>


-- 
Jeff Duda
Research Scientist
Cooperative Institute for Research in Environmental Sciences at the
University of Colorado
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