Cory Simon

eg. in scikit-learn's `StandardScaler`: "If a variance is zero, we can’t achieve unit variance, and the data is left as-is, giving a scaling factor of 1." https://scikit-learn.org/stable/modules/generated/sklearn.preprocessing.StandardScaler.html#sklearn.preprocessing.StandardScaler

docs are now [here](https://playground.arduino.cc/Code/PIDLibrary/). (thanks, Brett, for pointing this out.)

ha ha---the website URL doesn't save the path... odd. we need to click "Libraries", then the "PIDLibrary - Provides basic feedback control" is listed on the webpage.

feel like we should start with the split observations, stratified version, first. this is the simplest/clearest implementation I could come up with that works for (i) target vector `y` with...

cpk colors, convert to RGB via `[RGB((Xtals.DEFAULT_CPK_COLORS[a] ./ 255)...) for a in xtal.atoms.species]`

would be great to have! but to avoid making PM.jl more difficult to install than it already is, by giving it dependencies on Python packages... :laughing:, maybe better in a...

``` IOError: mkdir("/Users/cokes/.julia/pluto_notebooks/data/simulations"; mode=0o777): no such file or directory (ENOENT)``` create directory for snapshots file if it doesn't exist

is there at least a way to manually add an annotation on/near an atom, for now? we just want to annotate a few atoms with a "!" to "mark" them....

 That is beautiful! Thanks! * What is the second argument of the isosurface, 0.01? * What is causing the scale to be off (the surface should wrap around the...

I get the following working when I use `Pkg.clone()`, so that's why I was suggesting to use `add`. ``` ┌ Warning: Pkg.clone is only kept for legacy CI script reasons,...