I think it is kind of logical error of when you try to calculate values in waterfall style like below:
Vectorization gives you the possibility for defining the a,b,c as let’s say X and ya,yb,yc as Y then calculate the latter just with writing logic of X*3.
In other languages like R,Python, and Octave it is very easy. However, it is a bit tricky in C#. You should find a numerical package. The bullshit is this kind of external package is not allowed under SQLServer CLR (Common Native Runtime). That means sometimes you should write your own ‘numerical operation library’ I have written easy one for a few operations. It works like in the picture. It is more reasonable than waterfall style.
The functions for array operation is here.