Valanza – my Unix way for weight tracking and anlysis | Hacker News Reader

Valanza – my Unix way for weight tracking and anlysis

github.com

29 pointslallero31712 comments

Nice idea, but "small composable programs" includes R scripts? That's great if you're already using R, a bit much to install if you're not.

You could simplify things by cribbing from the Hacker's Diet (https://www.fourmilab.ch/hackdiet/) and using an exponentially weighted moving average as your filter. 10% of today's weight + 90% yesterday's EWMA. That's almost a one-liner in awk or perl, or a simple function in bash.

Copilot suggests: awk 'BEGIN{alpha=0.1} NF>=2 { date=$1; w=$2; if (NR==1) ewma=w; else ewma=alpha*w + (1-alpha)*ewma; printf "%s\t%g\t%.6f\n", date, w, ewma }' input.txt

I don't think "small" has ever been meant to include the runtime. Is R much more complex of a runtime than awk perl or bash?

For the giggles:

nice idea, but "small composable programs" includes perl scripts? That's great if you're already using perl, a bit much to install if you're not.

There shouldn't be any burden of portability for the one writing small tools like these. You're free to rewrite it, of course, but expecting someone to go out of their way to stay within the unix/posix/whatever environment seems a bit much given the context of an unpaid endeavor.

That's literally what that lp1.awk does. The R script just fills the gaps in data by interpolating.

Thanks for the link

A friend did similar using rc on Plan 9: https://shithub.us/rodri/rcfitness/HEAD/info.html

Awesome, I needed this: I was going to implement something similar.

Always been a big 9fan (not unintentionally there is a valanza.rc :P).

Great stuff! You can make minor adjustments to the R-script so you do not need to rely on {dplyr} and {tidyr}. For example, use merge() instead of left_join() and use the base pipe, |>, instead of the magrittr pipe, %>%.

Thanks. Just pushed. (I had never used R before).

Note. In southern Italian lingos, "valanza" means "scale".

Same root as valence surely

Italian is "bilancia" (same root as balance).

Love your approach: small, composable programs working together through pipes!

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