I have a Material node setup that processes color and I want to recreate that node tree for the Compositor.
Unfortunately the setup relies on a Vector Math : Length
node to accomplish what it does.
Looking at the Blender Manual's entry for the Vector Math node, we can see that Length is performing the following function:

Can this be replicated using Math
nodes in the Compositor?
(A * A)*x
orA*(x*2)
and since I don't want to patch something together based on assumptions, I just ask. But the math makes perfect sense to me when I see it in the form of Blender nodes! I realize there would probably be value in studying mathematical notation at some point, but that can be said of many things. Will I ever get around to it? Remains to be seen... :-) And by posting Q&A about it, hopefully others of limited math skills will also find this info helpful. $\endgroup$