User Portlet User Portlet

Discussions
I've been working with this cloud thing for a while; and implemented rotations with rotation vectors; but in evaluating the overlap between Quaternions and Rotations with rotation vectors, there are some differences; and I'm no expert in quaternions,...
https://www.wolframcloud.com/obj/f921ce60-b671-475e-bea4-0053bc0308a6 How do I use keyboard to browse this? I'm not actually asking for myself, I shared this with someone to get feedback, and they asked why they couldn't use the keyboard; I...
So I did this notebook, with a bunch of utility functions dealing with Rotation Vectors... (something like quaternions, but not) I would like to then use these in other notebooks with a minimum of boilerplate... how do I export a set of functions...
https://www.wolframcloud.com/obj/68428eed-0e9a-411b-a054-03d3c6aab0f7 On this, about halfway down, I define this gsum2 function.... gsum2[sort_,x_,y_,z_,b_]:=( (*wells is passed as a function, this sorts the wells according to the...