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

Eric Berger er|cjberger @end|ng |rom gm@||@com
Sun Aug 29 17:57:32 CEST 2021

Hi Rich,
Your request is a bit open-ended but here's a suggestion that might help
get you an answer.
Provide dummy data (e.g. 5-10 lines), say like the contents of a csv file,
and calculate by hand what you'd like to see in the plot. (And describe
what the plot would look like.)
It sounds like what you want could be done in a few lines of R code which
would work both on the dummy
data and the real data.


On Sun, Aug 29, 2021 at 6:09 PM Rich Shepard <rshepard using appl-ecosys.com>

> I have a year's hydraulic data (discharge, stage height, velocity, etc.)
> from a USGS monitoring gauge recording values every 5 minutes. The data
> files contain 90K-93K lines and plotting all these data would produce a
> solid block of color.
> What I want are the daily means and standard deviation from these data.
> As an occasional R user (depending on project needs) I've no idea what
> packages could be applied to these data frames. There likely are multiple
> paths to extracting these daily values so summary statistics can be
> calculated and plotted. I'd appreciate suggestions on where to start to
> learn how I can do this.
> TIA,
> Rich
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