[R] Calculate daily means from 5-minute interval data

Rich Shepard r@hep@rd @end|ng |rom @pp|-eco@y@@com
Fri Sep 3 17:37:13 CEST 2021

On Thu, 2 Sep 2021, Jeff Newmiller wrote:

> Regardless of whether you use the lower-level split function, or the
> higher-level aggregate function, or the tidyverse group_by function, the
> key is learning how to create the column that is the same for all records
> corresponding to the time interval of interest.


I tried responding to only you but my message bounced:

<jdnewmil using dcn.davis.ca.us>: host
     d9300a.ess.barracudanetworks.com[] said: 550 permanent
     failure for one or more recipients (jdnewmil using dcn.davis.ca.us:blocked) (in
     reply to end of DATA command)

My response was not pertininet to the entire list, IMO, so I sent it to your


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