Am 24.08.2021 um 21:01 schrieb Brian Revell:
> Are there any script files or GUI functions that will aggregate daily
> data to monthly average frequency, or monthly to annual?
>

Please look under the Data menu for Compact data (which you can discuss
with other native speakers whether it is self-evident what it means, but
I have translated it into German as Lower the data frequency). You
should then get a choice window of how to perform the conversion.

 From monthly to annual it may be necessary to have an intermediate
stopover at quarterly, don't remember right now.

cheers
sven
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